Alot of us don't really know the real truth behind the holy mass.
Here's just a little briefing on the holy mass (Calvary Continues)...

Catalina Rivas of Cochabamba, Bolivia, who now dwells in M？rida, Yucat？n, M？xico. She is said to receive Messages from Jesus, Mary, and the angels. She has the approval of her Bishop, Ren？ Fern？ndez Apaza, who has given his imprimatur to her Messages. The following text is the reproduction of booklet, “The Holy Mass,” in which Our Lord and Our Lady explain to Catalina what is really going on during the Mass in the spiritual realm, and how we should be more concentrated on the great mysteries that are taking place. Bo. Daniel Gagnon, OMI, of the Commission for the Doctrine of the Faith of the Archdiocese of Mexico, wrote about this book: “I do not find anything against the faith or the customs of the Church. It is not my function to confirm its supernatural character; nevertheless, I recommend it for its spiritual inspiration.” The testimony of Catalina on the Holy Mass In a marvelous catechesis, the Lord and the Virgin Mary have been instructing us first on how to pray the Rosary, that being to pray it with our hearts, and meditate and enjoy the moments when we encounter God and our Blessed Mother. They have also instructed us on the way to make a good confession and, in this document, a teaching on what happens during the Holy Mass and how to live it with our hearts. This is the testimony that I must and want to give to the whole world, for the greater Glory of God and for the salvation of all of those who want to open their hearts to the Lord. It is also given so that many souls consecrated to God will rekindle the fire of their love for Christ, some of whom are the owners of the hands that have the power to bring Him to our world so that He can become our nourishment. It is also given for others so that they break lose of the “routine practice” of receiving Him, and relive the amazement of their daily encounter with Love. And it is given so that my lay brothers and sisters from the entire world live the greatest Miracle with their hearts: the celebration of the Eucharist. It was the vigil of the Annunciation, and the members of our group had gone to the Sacrament of Reconciliation. Some of the ladies of the prayer group had not been able to do it, and so they left their reconciliation for the next day before the Mass. When I arrived at church the next day, a little bit late, the Archbishop and priests were already coming out of the sacristy. The Virgin Mary said with Her soft and feminine voice that sweetens one's soul: “Today is a day of learning for you, and I want you to pay close attention because of what you will witness today. Everything that you will experience today, you will have to share with all of humanity.” I was deeply moved without understanding why, but I tried to be very attentive. The first thing I noticed was a choir of very beautiful voices that was singing as if it was far away. For moments the music came closer and, then, it went further away like the sound of the wind. The Archbishop started Mass and, when he reached the Penitential Rite, the Blessed Virgin said: “From the bottom of your heart, ask the Lord to forgive your faults that have offended Him. In this way, you will be able to participate worthily in this privilege of assisting at the Holy Mass.” I thought for a fraction of a second: “Surely I am in a state of grace of God; I went to confession last night.” She answered: “Do you think that since last night you have not offended the Lord? Let Me remind you of a few things. When you left to come here, the girl who helps you approached to ask you for something and, as you were late and in a hurry, you did not answer her in a very nice way. There was a lack of charity on your part, and you say, you have not offended God...? “While on the way here, a bus crossed over your lane and almost hit you. You expressed yourself in a very non-advisable way against that poor man, instead of saying your prayers and preparing yourself for Mass. You have failed in charity and lost your peace and patience. And you say you have not hurt the Lord? “You arrive at the last minute when the procession of the celebrants is already coming out to celebrate the Mass... and you are going to participate without previous preparation...” I replied, “All right, my Mother, say no more to me. You do not have to remind me of more things because I am going to die of grief and shame.” “Why must you all arrive at the last moment? You should have arrived earlier to be able to pray and ask the Lord to send His Holy Spirit that He may grant you a spirit of peace and cleanse you of the spirit of the world, your worries, your problems, and your distractions so as to enable you to live this so sacred a moment. However, you arrive almost when the celebration is about to commence, and you participate as if it is an ordinary event, without any spiritual preparation. Why? This is the greatest of Miracles. You are going to live the moment when the Most High God gives His greatest gift, and you do not know how to appreciate it.” This was enough. I felt so bad that I had more than enough to ask for forgiveness from God. It was not only for the offenses of that day, but also for all the times that, like so many other people, I had waited for the priest to finish his homily before entering the Church. It was also for the times that I did not know or refused to understand what it meant to be there, and for the times that perhaps my soul was full of more serious sins, and I had dared to participate in the Holy Mass. It was a feast day, and the Gloria was to be recited. Our Lady said: “Glorify and bless with all your love the Holy Trinity, in your acknowledgement of being one of Its creatures.” How different was that Gloria! Suddenly I saw myself in a far off place full of light, before the Majestic Presence of the Throne of God. With so much love I went on thanking Him, as I repeated: “For your immense Glory we praise You, we bless You, we adore You, we give You glory, we give You thanks, Lord, God, Heavenly King, God the Father Almighty.” And I recalled the paternal face of the Father, full of kindness. “Lord Jesus Christ, only Son of the Father, Lord God, Lamb of God, You take away the sins of the world...” And Jesus was in front of me, with that face full of tenderness and Mercy... “For You alone are the Holy One, You alone are the Lord, You alone are the most High Jesus Christ, with the Holy Spirit...”, the God of beautiful Love. He, Who at that moment, caused my whole being to tremble... And I asked: “Lord, deliver me from all evil spirits. My heart belongs to You. My Lord, send me Your peace so that I can gain the finest benefits from the Eucharist and that my life may produce the best fruits. Holy Spirit of God, transform me, act within me, guide me. Oh God, give me the gifts that I need to serve you better!” The moment of the Liturgy of the Word arrived, and the Virgin Mary made me repeat: “Lord, today I want to listen to Your Word and produce abundant fruit. May Your Holy Spirit clean the interior of my heart so that Your Word grows and develops in it, purifying my heart so that it may be well disposed.” Our Lady said: “I want you to be attentive to the readings and to all of the homily of the priest. Remember that the Bible says that the Word of God does not return without bearing fruit. If you are attentive, something from all that you heard will remain in you. You should try to recall, all day long, those Words that left an impression on you. Sometimes it may be two verses, other times the reading of the entire Gospel, or perhaps only one word. Savor them for the rest of the day, and it will then become part of you, because that is the way to change one's life, by allowing the Word of God to transform you. “And now, tell the Lord that you are here to listen, that you want Him to speak to your heart today.” Once again I thanked God for giving me the opportunity to hear His Word. And I asked Him for forgiveness for having had such a hard heart for so many years, and for having taught my children that they had to go to Mass on Sundays because it is commanded by the Church, and not for love and the need to be filled with God. I had attended so many Eucharistic Celebrations mostly out of obligation and, because of this, I believed I was saved. But I did not live it and, much less, did I pay attention to the readings or to the priest's homily! How much pain I felt for so many years of needless loss because of my ignorance! How superficial is our attendance at the Mass when we go only because someone is getting married, or for a funeral Mass, or because we have to be seen by society! How much ignorance about our Church and the Sacraments! How much waste in trying to instruct and enlighten ourselves about the things of the world, which in a moment can disappear, leaving us with nothing and, at the end of our life, not serve to extend a minute to our existence! However, we know nothing of that which will give us a little of heaven on earth and, afterwards, eternal life. And we call ourselves cultured men and women! A moment later the Offertory arrived, and the Holy Virgin said: “Pray like this: (and I repeated after Her) Lord, I offer all that I am, all that I have, all that I can. I put everything into Your Hands. Build it up, Lord, with the little thing that I am. By the merits of Your Son, transform me, God Almighty. I petition You for my family, for my benefactors, for each member of our Apostolate, for all the people who fight against us, for those who commend themselves to my poor prayers. Teach me to lay down my heart as if on the ground before them so that their walk may be less severe. This is how the saints prayed; this is how I want all of you to do it.” Thus, this is how Jesus asks us to pray, that we put our hearts as if on the ground so that they do not feel its severity, but rather that we alleviate the pain of their steps. Suddenly some characters, whom I had not seen before, began to stand up. It was as if from the side of each person present in the Cathedral, another person emerged, and soon the Cathedral became full of young, beautiful people. They were dressed in very white robes, and they started to move into the central aisle and, then, went towards the Altar. Our Mother said: “Observe. They are the Guardian Angels of each one of the persons who are here. This is the moment in which your guardian angel carries your offerings and petitions before the Altar of the Lord.” At that moment, I was completely astonished, because these beings had such beautiful faces, so radiant as one is unable to imagine. Their countenance was very beautiful with almost feminine faces; however, the structure of their body, their hands, their height were masculine. Their naked feet did not touch the floor, but rather they went as if gliding. That procession was very beautiful. Some of them were carrying something like a golden bowl with something that shone a great deal with a golden-white light. The Virgin Mary said: “They are the Guardian Angels of the people who are offering this Holy Mass for many intentions, those who are conscious of what this celebration means. They have something to offer the Lord.” “Offer yourselves at this moment; offer your sorrows, your pains, your hopes, your sadness, your joys, your petitions. Remember that the Mass has infinite value. Therefore, be generous in offering and in asking.” Behind the first Angels came others who had nothing in their hands; they were coming empty handed. The Virgin Mary said: “Those are the angels of the people who are here but never offer anything. They have no interest in living each liturgical moment of the Mass, and they have no gifts to carry before the Altar of the Lord.” At the end of the procession came other angels who were rather sad, with their hands joined in prayer but with their eyes downcast. “These are the Guardian Angels of the people who are here, but do not want to be, that is to say, of the people who have been forced to come here, who have come out of obligation, but without any desire to participate in the Holy Mass. The angels go forth sadly because they have nothing to carry to the Altar, except for their own prayers.” “Do not sadden your Guardian Angel. Ask for much, ask for the conversion of sinners, for peace in the world, for your families, your neighbors, for those who ask for your prayers. Ask, ask for much, but not only for yourselves, but for everyone else. “Remember that the offering which most pleases the Lord is when you offer yourselves as a holocaust so that Jesus, upon His descent, may transform you by His own merits. What do you have to offer the Father by yourselves? Nothingness and sin. But the offering of oneself united to the merits of Jesus, that offering is pleasing to the Father.” That sight, that procession was so beautiful that it would be difficult to compare it to another. All those celestial creatures bowing before the Altar, some leaving their offerings on the floor, others prostrating themselves on their knees with their foreheads almost touching the floor. And as soon as they arrived at the Altar, they would disappear from my sight. The final moment of the Preface arrived, and when the assembly said, “Holy, Holy, Holy”, suddenly everything that was behind the celebrants disappeared. Behind the left side of the Archbishop, thousands of Angels appeared in a diagonal line, small angels, big angels, angels with immense wings, angels with small wings, angels without wings. As the previous ones, all were dressed with tunics like the white robes of the priests or altar boys. Everyone knelt with their hands united in prayer, and bowed their heads in reverence. Beautiful music was heard as if there were many choirs with different voices, all singing in unison together with the people: Holy, Holy, Holy... The moment of the Consecration, the moment of the most marvelous of Miracles had arrived. Behind the right side of the Archbishop appeared a multitude of people also in a diagonal line. They were dressed in the same tunic, but in pastel colors of: rose, green, light blue, lilac, yellow, in short, in different and very soft colors. Their faces were also brilliant, full of joy. They all seemed to be the same age. You could note (I can't say why) that they were people of different ages, but their faces looked the same, without wrinkles, happy. They all knelt down as well at the singing of “Holy, Holy, Holy Lord...” Our Lady said: “These are all the Saints and the Blessed of Heaven, and....
http://www.michaeljournal.org/holymass.htm