Skeptical scrutiny is the means, in both science and religion, by which deep insights can be winnowed from deep nonsense.
Carl Sagan

First there is a time when we believe everything, then for a little while we believe with discrimination, then we believe nothing whatever, and then we believe everything again - and, moreover, give reasons why we believe.
Georg Christoph Lichtenberg

I don't know the key to success, but the key to failure is trying to please everybody.
Bill Cosby