[Theodore Roosevelt] was a naturalist on the broadest grounds, uniting much technical knowledge with knowledge of the daily lives and habits of all forms of wild life. He probably knew tenfold more natural history than all the presidents who had preceded him, and, I think one is safe in saying, more human history also.

Blessed is the man who has some congenial work, some occupation in which he can put his heart, and which affords a complete outlet to all the forces there are in him.

Man is, and always has been, a maker of gods. It has been the most serious and significant occupation of his sojourn in the world.

There is a condition or circumstance that has a greater bearing upon the happiness of life than any other. What is it? Something to do; some congenial work. Take away the occupation of all people and what a wretched world it would be.

The art of nature is all in the direction of concealment.

The lesson which life repeats and constantly enforces is 'look under foot.' You are always nearer the divine and the true sources of your power than you think.

Look underfoot. You are always nearer to the true sources of your power than you think. The lure of the distant and the difficult is deceptive. The great opportunity is where you are. Don't despise your own place and hour. Every place is the center of the world.