I was reflecting further on the saying from my previous post. 

Here are three quotes, which I remembered, that support this post in some way:

• “Believe nothing just because a so-called wise person said it. Believe nothing just because a belief is generally held. Believe nothing just because it is said in ancient books. Believe nothing just because it is said to be of divine origin. Believe nothing just because someone else believes it. Believe only what you yourself test and judge to be true.”
  – Buddha
• “It is the mark of an educated mind to be able to entertain a thought without accepting it.”
  – Aristotle
• “He is his own sifter of evidence, but is open to evidence from all sources.”
  – Carl Rogers, on the self-actualized person