For what it's worth, that book is probably most to blame for shoving me hard from Christianity to secular agnosticism. I grew up being able to feel God's presence and love. The Power of Now helped me look at where that feeling originates (internally), how it is connected to me, and how universal it is across various traditions and religions throughout time. What is it? I don't know. But calling it God and being done with it doesn't describe it well. It's a part of you and your brain is involved in the process.