Stupidity is without anxiety.

To have seen Italy without having seen Sicily is to not have seen Italy at all, for Sicily is the clue to everything.

Then to the depths! - I could as well say height: It's all the same.

As for solitude, I cannot understand how certain people seek to lay claim to intellectual stature, nobility of soul and strength of character, yet have not the slightest feeling for seclusion; for solitude, I maintain, when joined with a quiet contemplation of nature, a serene and conscious faith in creation and the Creator, and a few vexations from outside is the only school for a mind of lofty endowment.

Riches amassed in haste will diminish; but those collected by hand and little by little will multiply.

In the realm of ideas everything depends on enthusiasm... in the real world all rests on perseverance.

Some books seem to have been written, not to teach us anything, but to let us know that the author has known something.