@hightor,
You could regain it. How would it hurt?
It seems to me that atheism is one of if not
the easiest way to demonstrate one can remain true to one's principles.
You miss the sense of personal gratitude with respect to creation. If you slip, who will know, unless you tell them?
What is the personal cost of not believing in God?
Unlike being a member of one of the major religions, being an atheist doesn't require one to do or say anything that might reveal to the world one's lack of faith, and if some religious fanatic threatened you with death if you didn't swear allegiance to and worship of his or her particular god, who would you betray if you complied? Certainly not the
Great Void Wherein No God Dwells.
If you allowed yourself to be slaughtered for refusing to voice fealty to a being in which you don't believe, I would call you a fool. Devout Christians, Muslims and Jews won't convert at the tip of a sword because they believe they are betraying some one or some thing, and that there may be a price to pay for so doing. Again, The Void won't punish you if you deny it.
Being an atheist, from a practical standpoint, means nothing other than declaring yourself, and that can easily be confined to yourself. There are no rituals you are required to follow, and certainly, in this day and age, your failure to participate in the rituals of some of your believing neighbors wouldn't even be noticed.
Before any thin-skinned atheists launch an attack, this is in no way a criticism of atheists, merely a recognition of the fact that there is virtually no consequence materially or metaphysically to not believing in God, and isn't that one of the favorite arguments of many atheists? That you are a fool if you think your belief in God will reward you in some way?
On second thought, it might be a criticism of atheists who believe their non-belief is in some way courageous.
If you feel like your atheism is a way to rail against an unjust God who might smite you for it, you're not brave, you're a phony, and certainly not an atheist.