Knowledge and timber shouldn't be much used till they are seasoned.
Life is a fatal complaint, and an eminently contagious one.
To obtain a man's opinion of you, make him mad.
Speak clearly, if you speak at all; carve every word before you let it fall.
Science is good furniture for one's upper chamber, if there is common sense below.
Man's mind, once stretched by a new idea, never regains its original dimensions.
It is the province of knowledge to speak and it is the privilege of wisdom to listen.
I find the great thing in this world is not so much where we stand, as in what direction we are moving.
Civilization is the process of reducing the infinite to the finite.
A person is always startled when he hears himself seriously called an old man for the first time.