how do i gain faith?
by quitting the game, destroy all your porn and finally go to church or whatever religious institute you choose. Unless your chosen faith is very liberal about sexual matter and encourage masturbation, then do the opposite and download more porn and fap as much as possible.
If you couldn't tell, this is a joke answer, and i don't actually know how to gain faith in the game since i haven't started it yet and am just browsing through the comments.