I started to question around the age of 9 or 10. Not knowing the dubious evidence for Christ's existence, I believed him to have been a real person, but that Christianity was born out of a complete warping and misunderstandinf of his teachings. It never made sense to me that Jesus would go around telling everyone to love each other and such, and then also tell people that they were going to burn in hell if they didn't call him god.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell