[Direct divine intervention, divine manifestation will be the only thing that can convince an atheist otherwise. Between being dishonest to myself, or sobering to reality, the latter choice is what I’d make any day.]
Seems ot me that if you were wanting to be true to yourself, you’d want to know the truth so as to make the absolutely most honest descision possible. Being Atheist rules out/dismisses any other possibility right from the get go. Agnostics at least ceede that there might be another possibility, but they are unaware of the possiblity- that would at least seem a more honest assesment.
The person seeking the most honest stance it seems would hold their belief, but Ask of God to reveal Himself IF God indeed does exist, and would ask for the wisdom to recognize the revelation should it happen.
Naw... been there, done that. The years kept rolling by, and I just got stronger in my convictions. If that's the 'revelation' you describe, then every theist religion is false.
I do believe that the biggest atheists are the ones who pray the most fervently, ironically. They are so badly in need to justify their doubtable beliefs, they need to pull themselves and others into the absurd, much like how a crime seems to become naught, if everyone’s doing it.