We have learned now that we cannot regard this planet as being fenced in and a secure abiding place for Man we can never anticipate the unseen good or evil that may come upon us suddenly out of space.

The history of mankind for the last four centuries is rather like that of an imprisoned sleeper, stirring clumsily and uneasily while the prison that restrains and shelters him catches fire, not waking but incorporating the crackling and warmth of the fire with ancient and incongruous dreams, than like that of a man consciously awake to danger and opportunity.

Cynicism is humor in ill health.

When a man realizes his littleness, his greatness can appear.

Every time Europe looks across the Atlantic to see the American Eagle, it observes only the rear end of an ostrich.

The professional military mind is by necessity an inferior and unimaginative mind; no man of high intellectual quality would willingly imprison his gifts in such a calling.

What on earth would a man do with himself, if something did not stand in his way?