We do not need to be shoemakers to know if our shoes fit, and just as little have we any need to be professionals to acquire knowledge of matters of universal interest."

"The learner always begins by finding fault, but the scholar sees the positive merit in everything."

"An idea is always a generalization, and generalization is a property of thinking. To generalize means to think."

"It is a matter of perfect indifference where a thing originated; the only question is: "Is it true in and for itself?""

"No man is a hero to his valet. This is not because the hero is no hero, but because the valet is a valet."