«Fear is, I believe, a most effective tool in destroying the soul of an individual - and the soul of a people»

«But I have seen the science I worshipped and the aircraft I loved destroying the civilization I expected them to serve.»

«Call a thing immoral or ugly, soul-destroying or a degradation of man, a peril to the peace of the world or to the well-being of future generations; as long as you have not shown it to be ''uneconomic'' you have not really questioned its right to exist, grow, and prosper.»

«Criticism, like rain, should be gentle enough to nourish a man's growth without destroying his roots.»

«As our own species is in the process of proving, one cannot have superior science and inferior morals. The combination is unstable and self-destroying.»

«Dread not infanticide; the crime is imaginary: we are always mistress of what we carry in our womb, and we do no more harm in destroying this kind of matter than in evacuating another, by medicines, when we feel the need.»

«From the moment of birth, when the stone-age baby confronts the twentieth-century mother, the baby is subjected to these forces of violence, called love, as its mother and father have been, and their parents and their parents before them. These forces are mainly concerned with destroying most of its potentialities. This enterprise is on the whole successful.»

«Am I not destroying my enemies when I make friends of them?»

«He thought of all the living species that train their young in the art of survival, the cats who teach their kittens to hunt, the birds who spend such strident efforts on teaching their fledglings to fly - yet man, whose tool of survival is the mind, does not merely fail to teach a child to think, but devotes the child's education to the purpose of destroying his brain, of convincing him that thought is futile and evil, before he has started to think ... Men would shudder, he thought, if they saw a mother bird plucking the feathers from the wings of her young, then pushing him out of the nest to struggle for survival - yet that was what they did to their children.»

«Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a mountain, gaining new and wider views, discovering unexpected connections between our starting points and its rich environment. But the point from which we started out still exists and can be seen, although it appears smaller and forms a tiny part of our broad view gained by the mastery of the obstacles on our adventurous way up.»