“Learn to bear criticism. Do not be childishly biased by your own opinions.”

“A critic is a bundle of biases held loosely together by a sense of taste.”

“The first rule of learning philosophy is to ban the hypothesis of knowing anything. You must go beyond your own opinions.”

“learn from my miseries, and do not seek to increase your own.”

“Friend, bethink you first what it is that you would do, and then what your own nature is able to bear.”

“Do not let another day go by where your dedication to other people's opinions is greater than your dedication to your own emotions!”

“Don’t consult anyone’s opinions but your own.”
Nec te quaesiveris extra.

“Four predictions of the Big Bang Theory have now been verified - surely enough to quench even the most biased critics.”

“There are three things, young gentlemen, which you are constantly to bear in mind. Firstly, you must always implicitly obey orders, without attempting to form any opinion of your own respecting their propriety. Secondly, you must consider every man your enemy who speaks ill of your king; and thirdly, you must hate a Frenchman, as you do the devil.”

“Learn Everything that is Good from Others, but bring it in, and in your own way absorb it; do not become others.”