Travel and society polish one, but a rolling stone gathers no moss, and a little moss is a good thing on a man.

We've been in a period of relative stability and cooperation since the end of the Cold War among the world's major powers, but that may not always exist. And certainly one could even predict that there will be periods of hostility or tension ahead.

To see Earth fully we already need to love it

One summer day, while I was walking along the country road on the farm where I was born, a section of the stone wall opposite me, and not more than three or four yards distant, suddenly fell down. Amid the general stillness and immobility about me the effect was quite startling. ... It was the sudden summing up of half a century or more of atomic changes in the material of the wall. A grain or two of sand yielded to the pressure of long years, and gravity did the rest.

Nothing relieves and ventilates the mind like a resolution.

Unfortunately, nuclear weapons have become identified with state power.

I want nothing less than a faith founded upon a rock, faith in the constitution of things. The various man-made creeds are fictitious, like the constellations Orion, Cassiopeia’s Chair, the Big Dipper; the only thing real in them is the stars, and the only thing real in the creeds is the soul’s aspiration toward the Infinite.