The journey is difficult, immense. We will travel as far as we can, but we cannot in one lifetime see all that we would like to see or to learn all that we hunger to know.

God knows how many things a man misses by becoming smug and assuming that matters will take their own course.

At the core of the universe, the face of God wears a smile

The creative element in the mind of man . . . emerges in as mysterious a fashion as those elementary particles which leap into momentary existence in great cyclotrons, only to vanish again like infinitesimal ghosts.

Each man deciphers from the ancient alphabets of nature only those secrets that his own deeps possess the power to endow with meaning.

From the solitude of the wood, (Man) has passed to the more dreadful solitude of the heart.

Over the whole earth- this infinitely small globe that possesses all we know of sunshine and bird song- an unfamiliar blight is creeping: man- man, who has become at last a planetary disease and who would, if his technology yet permitted, pass this infection to another star.