An early-morning walk is a blessing for the whole day.

Do not be too moral. You may cheat yourself out of much life so. Aim above morality. Be not simply good; be good for something.

Whatever has not come under the sway of man is wild. In this sense original and independent men are wild - not tamed and broken by society.

When I would re-create myself, I seek the darkest wood, the thickest and most interminable and to the citizen, most dismal, swamp. I enter as a sacred place, a Sanctum sanctorum. There is the strength, the marrow, of Nature.

The past is only so heroic as we see it. It is the canvas on which our idea of heroism is painted, and so, in one sense, the dim prospectus of our future field.

As a man thinks of himself, so he is.

There is always room and occasion enough for a true book on any subject; as there is room for more light the brightest day and more rays will not interfere with the first.