My acting teacher used to say that people reveal themselves in their opposites.
So much of our lives are defined by habit or what the guy next to us is doing...
People can do all kinds of things that maybe aren't wise in hindsight because...
It is not because the truth is too difficult to see that we make mistakes... we make mistakes because the easiest and most comfortable course for us is to seek insight where it accords with our emotions - especially selfish ones.