The moment when the scientists became engineers was a historical turning point. - Ivar Ekeland

We do not discover mathematical truths; we remember them from our passages through this world outside our own.

Well, it has been a long time since manna last fallen from heaven. We cannot live alone; we rely on others to produce the stuff of our material and intellectual life, and we have to organize society so that its members will cooperate toward the common good.

What is needed is courage: it is always so much easier to accept what you are being told than to think for yourself.