Knowledge.

.
"Real knowledge is to know the extent of ones ignorance" ~ Confucius.

A Simple Guy has found that the most difficult insights to accept and embrace are often the most powerful. We all find support, intellectual comfort and confidence from the advice, opinions and beliefs we agree with. They make us feel good. But we learn the most from the stimuli and contrarians that challenge us. There is no comfort in cognitive dissonance but there is opportunity. How we respond to adversaries teaches us about ourselves. When We Think We Know - We Don't.