The cat is the only animal which accepts the comforts but rejects the bondage of domesticity.

Only well-written works will descend to posterity. Fulness of knowledge, interesting facts, even useful inventions, are no pledge of immortality, for they may be employed by more skilful hands; they are outside the man; the style is the man himself.

Time is the great workman of Nature.

The human mind cannot create anything. It produces nothing until having been fertilized by experience and meditation; its acquisitions are the germs of its production.

We can only penetrate the rind of the earth.

Those who write as they speak, even though they speak well, write badly.

Hold on; hold fast; hold out. Patience is genius.