|"You are more like me than you realize."|
In the insatiable quest for certainty, humans have to negotiate with reality as well as what we tell ourselves is reality.
The obvious boggle in this chain of interaction is the fact that ALL reality must pass through the filter of what we tell ourselves, making it quite easy for us to interpret things through the further filters of our biases. This is the main tool used by the "treacherous heart."
Take skepticism. Skepticism is not a position one takes in the world, but rather a methodology. Skeptics pride themselves on being completely objective and without bias in evaluating claims about "reality." The group of people primarily associated with skepticism are scientists as they apply scientific method to their belief systems in order to determine a objectivity without the use of presumptions and "common sense." However, there is a trap to wearing the mantle of skepticism in the fact that it can bring credibility to hidden biases through "selective skepticism."