Fasting - Matthew 17 & Mark 9

Pastor Tom I want to ask for prayer for my grandson, who I have adopted but he told me some time back that he doesn’t believe in God, creation or anything about God!! This scares me because my mom use to say I would rather believe there is a God and die and find out there isn’t than to not believe and die and find out there is!! I am making that one of my things I am going to fast and pray for and I ask you to please pray for this with me please?? I love your devotionals!!!