Men will work hard for money. They will work harder for other men. But men will work hardest of all when they are dedicated to a cause. Until willingness overflows obligation, men fight as conscripts rather than following the flag as patriots. Duty is never worthily performed until it is performed by one who would gladly do more if only he could.

He who cannot rest, cannot work; he who cannot let go, cannot hold on; he who cannot find footing, cannot go forward.

He who knows no hardships will know no hardihood. He who faces no calamity will need no courage. Mysterious though it is, the characteristics in human nature which we love best grow in a soil with a strong mixture of troubles.

All intelligent faith in God has behind it a background of humble agnosticism.

Don't simply retire from something; have something to retire to.

The all but unanimous judgment seems to be that we, the democracies, are just as responsible for the rise of the dictators as the dictatorships themselves, and perhaps more so.

The stars are not so strange as the mind that studies them, analyzes their light, and measures their distance.