Death is not the enemy; living in constant fear of it is.

Intelligence and the spirit of adventure can be combined to create new energies, and out of these energies may come exciting and rewarding new prospects.

Cynicism is intellectual treason.

Optimism doesn't wait on facts. It deals with prospects. Pessimism is a waste of time.

The capacity for hope is the most significant fact of life. It provides human beings with a sense of destination and the energy to get started.

Humanity today is not safe in the presence of humanity. The old cannibalism has given way to anonymous action in which the killer and the killed do not know each other, and in which,indeed, the very fact of mass death has the effect of making mass killing less reprehensible than the death of a single individual. In short, we have evolved in every respect except our ability to protect ourselves against human intelligence. Our knowledge is vast but does not embrace the workings of peace.

Do you prefer that you be right or happy?