Mathematics is an experimental science, and definitions do not come first, but later on.

Why should I refuse a good dinner simply because I don't understand the digestive processes involved?

Shall I refuse my dinner because I do not fully understand the process of digestion?

The best result of mathematics is to be able to do without it.

Theory is the essence of facts. Without theory scientific knowledge would be only worthy of the madhouse.

If it is love that makes the world go round, it is self-induction that makes electromagnetic waves go round the world.

...there is no absolute scale of size in nature, and the small may be as important, or more so than the great.

Euclid for children is barbarous.

Logic can be patient, for it is eternal.

Waves from moving sources: Adagio. Andante. Allegro moderato.

However absurd it may seem, I do in all seriousness hereby declare that I am animated mainly by philanthropic motives. I desire to do good to my fellow creatures, even to the Cui bonos.

Well, why not just snap my damn olive branch and beat me with it? I was only trying to help.

Many of us pursue pleasure with such breathless haste that we hurry past it.

I love to exercise outside in the fresh air and sun: hiking, swimming, stand-up paddleboarding, and jogging.

We must act now to save Americans from the imploding Obamacare disaster.

Lately, Ive been listening to some jazz albums. I love the new Pat Metheny album. John Coltrane. I still like good metal, though!

I'm loyal to a fault. I may have learned that from my mother.

I'm not the guy you kill. I'm the guy you buy! Are you so blind that you don't even see what I am? I sold out Arthur for 80 grand. I'm your easiest problem and you're gonna kill me?

Believe that all the resources you need are in your mind. That is a formula that really works.

The earth is blue like an orange.

Prices need to be fair, appropriate and consistent.