Lee McIntyre:

The real enemy is not ignorance, doubt, or even disbelief. It is false knowledge. When we profess to know something even in the face of absent or contradicting evidence, that is when we stop looking for the truth.

Maria Konnikova:

Even when we think we've properly corrected a false belief, the original exposure often continues to influence our memory and thoughts.

Niels Bohr:

An expert is a person who has found out by his own painful experience all the mistakes that one can make in a very narrow field.

Mark Danner:

We translated our ignorance into their pain.

Douglas Adams:

There's nothing easier than getting a human mind to ignore something it doesn't want to see.

Louis Menand:

We would rather find more reasons for believing what we already believe than look for reasons that we might be wrong.

Josh Wills:

The human capacity for post-hoc rationalization is basically infinite.