There are two kinds of Spirit, the good on God's side, and the Evil ones promoting the agenda of the devil on earth. These spirit seeks a body to operate in and they many times enter people through thoughts, infactuation, dreams and in some cases, based on covenant ancestors have made which extends to their offsprings.

In the olden days, people and communities needed help either in time of wars or in time of an outbreak of a disease. The gospel not being present, they resort to traditional and black magic for help. In the course of getting the black power to intervene, they make makings(gbere in Yoruba) and some other blood covenant. This covenant gives these demons legal access into the lives of men, though they may have the ability to give cures or provide a solution in one hand. For instance, a Yahoo plus-er or ritualist may be given money, but at the same time, he is deprived of some other freedom or legalities.

Lot and lot of people don't know these things and it makes warfare very necessary. There are people who have sworn or who would swear that over their dead body would so so so person achieve so so so success. It is the power of witchcraft and the truth is, all the power of witchcraft have to do is, know a person's weakness, know how to bring the person or permanent such person in the life of sin, so when the person is living a sinful life, these demons has the full access to steal from, kill important things and destroy the life of such person. And that is why it is important that Christians have a deeper understanding of Spiritual Warfare cause spiritual warfare is very real. It is good to have adequate understanding of how these things works. A lot of people are actually living according to the dictates of a power that is above them, but they just don't see it. Witchcraft Spirit have a way of manipulating people

They would manipulate lives and destiny. Some people have a bright and promising future, but when people who have devoted their lives to these spirits. They began to do the biddings of these spirits.

After the death of Jesus, satan was not really happy that the gospel was growing and men were having authority over him. So he kept devicing means by which he would reduce the extent to which Christianity can go. And I must confess, based on history, it took about 300 years of being killed if you are detected or by chance, the Romans who were in charge sees a sign that one is a Christian. And then, Christianity became what we see in Catholic today

Go and read about the history of your religion very well.

Go and read about the "Rosetta Stone"

What you practice as Christianity, is a cheap copy of ancient Egyptian mystery religion.