Pastors err when they tell the congregation in church or on TV 'Lord write their names in the book of life'. When pastors say such statements or make sentences like God is the beginning & the end, God knows the beginning from the end & vice versa,etc then they should have stopped saying 'write their names.....' cos you can't continue to tell God what names should be put when he God knows the end of such person. Whatever has & will happen on earth he knows like the garden of eden. Also Remember what God told Abraham about his generation, that should let everyone know that whether you go to church or not, come out @ altar-call or not, etc we can't change anything as regards our destination...if it is hell so be it, if heaven no problem.
I know some of u will say we have choices, yes, that is why he is God who knows who will be rich/poor, who will denial/betray him, & remember if not for Judas, christ wouldn't have died meaning no salvation for us so whether judas had a choice or not there MUST be someone to BETRAY CHRIST simple.
What is written is written (The bk of Revelation) is more like saying what will be will be.
Note: all i'm pointing out is that God already know the right nos of people that will make it, no subtraction/addition. If it is 50people that will make it then there is no amt of prayer from pastors that will change it even the pastors aren't left out cos many of them wouldn't make it