I believe the following quotes apply here:
There is nothing to fear except the persistent refusal to find out the truth, the persistent refusal to analyze the causes of happenings.
There is nothing to fear except the persistent refusal to find out the truth, the persistent refusal to analyze the causes of happenings.
Truth springs from argument amongst friends.
The great enemy of the truth is very often not the lie -- deliberate, contrived and dishonest -- but the myth -- persistent, persuasive and unrealistic
He that never changes his opinions, never corrects his mistakes, will never be wiser on the morrow than he is today.
well, pretty much all of them.