The corner stone of all religious life amounts to little more than the capacity to be ashamed of personal short-comings. Since trying like fury to cover up and camouflage (praise and blame) doesn't work very well, acknowledging those short-comings is a natural option, which is not the same as saying it's necessarily easy or even possible.
It can be a bit of a bummer: Covering up, acquiring the 'good things' in life, talking the good talk, has a way of going awry and yet meeting failures and bruises doesn't really provide a cure-all either. It seems an endless skein and yet those who cannot or do not acknowledge their short-comings are less human for it. Or maybe I just mean I'd prefer not to hang around with them.
A Zen teacher (can't remember who) once said, "in order to do this practice, you must feel shame." "Shame" of course is one of those fifty-cent no-no's in the culture where I live. Books are written about how deleterious "shame" is, how everyone is hard-wired for a fruitful joy. It's a cottage industry at a minimum. It's probably better not to call it "shame" since knee-jerk fixer-uppers are just waiting to pounce with another tome.
Whatever the negative implications, still I think that those who can stand the gaff of whatever shame assails them have an odds-on chance of being nicer people.
But that may be a bit too facile, a bit too fortune-cookie-esque.