And this list could continue on and on... for me the only answer it the quote below... i dont want to seem repetitive, but for me its the only answer...

"Everything we do, everything we are, rests on our personal power. If we have enough of it, one word uttered to us might be sufficient to change the course of our lives. But if we don't have enough personal power, the most magnificent piece of wisdom can be revealed to us and that revelation won't make a damn bit of difference." Don Juan Matus - Tales of Power

Each one follows what each one thinks its right. The level of "rightness" of each one follows the amount of personal power of each one.
And its always good to remember Matthew 7:1. "Judge not, that ye be not judged."