The aim of science is not to open the door to infinite wisdom, but to set a limit to infinite error.
Speakers have been showering us with pearls of wisdom for centuries, and if all of their valuable advice were laid end to end, it would still be just as good as new. Very little of it has ever been used.
Perhaps a child who is fussed over gets a feeling of destiny; he thinks he is the world for something important, and it gives him drive and confidence.
The essence of life is doing things for their own sakes.
It is clear that thought is not free if the profession of certain opinions makes it impossible to earn a living.
The degree of one's emotions varies inversely with one's knowledge of the facts.
There is a wisdom of the head, and a wisdom of the heart.
But injustice breeds injustice; the fighting with shadows and being defeated by them necessitates the setting up of substances to combat.
A word in earnest is as good as a speech.
Take nothing on its looks; take everything on evidence. There's no better rule.