Man cannot survive except through his mind. He comes on earth unarmed. His brain is his only weapon. Animals obtain food by force. man had no claws, no fangs, no horns, no great strength of muscle. He must plant his food or hunt it. To plant, he needs a process of thought. To hunt, he needs weapons,and to make weapons - a process of thought. From this simplest necessity to the highest religious abstraction, from the wheel to the skyscraper, everything we are and we have comes from a single attribute of man -the function of his reasoning mind.

What I want you to understand, is the full evil of those who claim to have become convinced that this earth, by its nature, is a realm of malevolence where the good has no chance to win. Let them check their premises. Let them check their standards of value. Let them check - before they grant themselves the unspeakable license of evil-as-necessity - whether they know what is the good and what are the conditions it requires.

If you surrender everything to the government and give it total power to plan the whole economy, this will not guarantee your economic security, but it will guarantee the descent of the entire nation to a level of miserable poverty--as the practical results of every totalitarian economy, communist or fascist, have demonstrated.

Civilization does not have to perish. The brutes are winning only by default.

There is only one source of authentic self-confidence: reason.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.

It's the hardest thing in the world - to do what we want. And it takes the greatest kinds of courage.