Superstition belongs to the essence of mankind and takes refuge, when one thinks one has suppressed it completely, in the strangest nooks and crannies; once it is safely ensconced there, it suddenly reappears.

Love and desire are the spirit's wings to great deeds.

Humor is one of the elements of genius--admirable as an adjunct; but as soon as it becomes dominant, only a surrogate for genius.

We are our own aptest deceiver.

To make converts is the natural ambition of everyone.

All truths are old, and all that we have to do is recognize and utter them anew.

There are but two roads that lead to an important goal and to the doing of great things: strength and perseverance. Strength is the lot of but a few privileged men; but austere perseverance, harsh and continuous, may be employed by the smallest of us and rarely fails of its purpose, for its silent power grows irresistibly greater with time.