aren't missionaries trained in this EXACT field? i mean, as a borderline agnostic/atheist (i don't believe in god, but i also know that i have no way of proving i'm 100% right, so i can't say there isn't) i enjoy the debates and offering new perspectives, but at the end of the day losing your faith is a deeply personal experience that no single person can be forced into. It has to come when you're ready.