How many thorns of human nature - hard, sharp, lifeless protuberances that tear and wound us, narrow prejudices, bristling conceits that repel and disgust us - are arrested developments, calcified tendencies, buds of promise that should have lifted a branch up into the sunny day with fruit; and flowers to delight the heart of men, but now all grown hard, petrified, for want of culture and a congenial soil and climate.

The atmosphere of our time is fast being cleared of the fumes and deadly gases that arose during the carboniferous age of theology.

One of the hardest lessons we have to learn in this life, and one that many persons never learn, is to see the divine, the celestial, the pure, in the common, the near at hand-to see that heaven lies about us here in this world.

I still find each day too short.

The rocks are not so close akin to us as the soil; they are one more remove from us; but they lie back of all, and are the final source of all. ... Time, geologic time, looks out at us from the rocks as from no other objects in the landscape.

He who marvels at the beauty of the world in summer will find equal cause for wonder and admiration in winter.

The budget for nuclear forces in the United States is on the order of $25 billion or so. That includes warheads, delivery systems, command and control; does not include environmental clean-up, which is another maybe $10 billion or so. So that's about 5% of the U.S. military budget.