The secret to humor is surprise.
Freedom is obedience to self-formulated rules.
It is unbecoming for young men to utter maxims.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
Anyone can become angry —that is easy. But to be angry with the right person, to the right degree, at the right time, for the right purpose, and in the right way —this is not easy.