Language was invented to ask questions.

To change everything, simply change your attitude.

Rudeness is the weak man's limitation of strength.

The passion to get ahead is sometimes born of the fear lest we be left behind.

The less justified a man is in claiming excellence for his own self, the more ready is he to claim all excellence for his nation, his religion, his race or his holy cause.

By all odds, earliest man, so naked to the elements and to deadly enemies, should have existed in a state of constant shock. We find him instead the only lighthearted being in a deadly serious universe.... He alone, with childish carelessness, tinkered and played, and exerted himself more in the pursuit of superfluities than of necessities. Yet the tinkering and playing, and the fascination with the nonessential, were a chief source of the inventiveness which enabled man to prevail over better-equipped and more-purposeful animals.

Nature is a self-made machine, more perfectly automated than any automated machine. To create something in the image of nature is to create a machine, and it was by learning the inner working of nature that man became a builder of machines.