One of the most dangerously vicious circles menacing the continued existence of all mankind arises through that grim striving for the highest possible position within the ranked order, in other words, the reckless pursuit of power which combines with an insatiable greed of neurotic proportions that the results of acquired power confer.

There is no faith which has never yet been broken, except that of a truly faithful dog

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.

I am convinced that of all the people on the two sides of the great curtain, the space pilots are the least likely to hate each other. Like the late Erich von Holst, I believe that the tremendous and otherwise not quite explicable public interest in space flight arises from the subconscious realization that it helps to preserve peace. May it continue to do so!

I believe that present day civilized man suffers from insufficient discharge of his aggressive drive

Few animals display their mood via facial expressions as distinctly as cats.

In nature we find not only that which is expedient, but also everything which is not so inexpedient as to endanger the existence of the species.