There is no limit to the ingenuity of man if it is properly and vigorously applied under conditions of peace and justice.

The only guide to man is his conscience.

Never engage in a battle of wits with an unarmed man.

This revelation of the secrets of nature, long mercifully withheld from man, should arouse the most solemn reflections in the mind and conscience of every human being capable of comprehension. We must indeed pray that these awful agencies will be made to conduce to peace among the nations, and that instead of wreaking measureless havoc upon the entire globe, may become a perennial fountain of world prosperity.

Islam is more dangerous in a man than rabies in a dog.

There is a place for everyone, man and woman, old and young, hale and halt; service in a thousand forms is open. There is no room now for the dilettante, the weakling, for the shirker, or the sluggard. From the highest to the humblest tasks, all are of equal honor; all have their part to play.

I did not like the man [Niels Bohr] when you showed him to me, with his hair all overhis head...

The Pashtun tribes are always engaged in private or public war. Every man is a warrior, a politician and a theologian Every large house is a real feudal fortress....Eve ry family cultivates its vendetta; every clan, its feud....Nothing is ever forgotten and very few debts are left unpaid.

A man can wear out a particular part of his mind by continually using and tiring it, just in the same way he can wear out the elbows of his coat.