Thought, true labor of any kind, highest virtue itself, is it not the daughter of Pain?

The healthy know not of their health, but only the sick: this is the physician's aphorism, and applicable in a far wider sense than he gives it.

It is the heart always that sees, before the head can see.

There is a perennial nobleness, and even sacredness, in work. Were he never so benighted, forgetful of his high calling, there is always hope in a man that actually and earnestly works: in idleness alone there is perpetual despair.

He that has done nothing has known nothing.

"Love is not altogether a Delirium," says he elsewhere; "yet has it many points in common therewith."

There is so much data available to us, but most data won't help us succeed.