I have learned that.. OK, I have another teacher in my life called Experience
so what my experiences and my learning have taught me is this:
Human beings are abysmally evil (selfish, lawless, malicious, etc) and entirely irredeemable without Jesus Christ (and even then....)
yeh, even those supposedly redeemed by Christ are often... [fill in the blanks]
now the Q is: what to do? what to do? Well, OK we kind of know what to do...