I made a list of the benefits of the benefits of leaving Christianity once and saved it.
[1] Hope for man and the world. When I was a Christian, I thought we were all goners. It was always the end times, and we were all praying for Jesus to come again and destroy the earth. But now, I know that it is possible that man can go on until he evolves into something better, and then again.
[2] Freedom from bondage caused by the fear of damnation. Freedom from fear of hell. Freedom from fear of Satan. Freedom from fear of demons and devils. Freedom from fear of my own thoughts. Freedom from the belief that I may be forced to remain conscious for much more than trillions of years no matter how boring or unpleasant existence becomes.
[3] Freedom from the illusion of being constantly watched by an angry, judgmental, authoritarian, smiting, prudish overlord.
[4] When a cute little doe-eyed girl dies of leukemia sometime later today (and one will somewhere), you'll have the comfort of knowing that it was just rotten luck, and not something caused by or allowed to happen by any ghost.
[5] Respect for mankind, life, earth and the universe. Christianity teaches that animals are soulless meat bags to be exploited as man sees fit, and man a constitutionally diseased creature. Then it teaches that the whole material world including earth is made of a base substance - matter - which is only transitory. Christianity demeans mankind enough to make the phrase "the flesh" derogatory, and the material world enough to make the word "worldly" an insult.
[6] Freedom from an intellectual system that despises science and erudition.
[7] Freedom from an ethic that defines love in terms of torture and crucifixion, or a pardon from eternal torment by an infinitely evil devil created by an allegedly loving god. The moral structure is wrong for me: Faith, worship and piety are not virtues. Autonomy is a virtue, not mindless submission. Becoming educated in the liberal arts is a virtue, not learning scripture. Courage is a virtue, not meekness.
[8] Relief from thousands of hours spent in churches, praying, and reading the bible. And I've saved thousands of dollars, diverted from being used to promote religion to things of more value to me.