However wretched a fellow-mortal may be, he is still a member of our common species.

Loyalty is the holiest good in the human heart.

We are as answerable for what we give as for what we receive; nay, the misplacing of a benefit is worse than the not receiving of it; for the one is another person's fault, but the other is mine.

The time will come when diligent research over periods will bring to light things which now lie hidden...Many discoveries are reserved for ages still to come, when memories of us will have been effaced. Our universe is a sorry little affair unless it has something for every age to investigate. nature does not reveal her mysteries once and for all.

Wisdom comes to no one by chance.

He who seeks wisdom is a wise man; he who thinks he has found it is mad.

If wisdom were offered me with the proviso that I should keep it shut up and refrain from declaring it, I should refuse. There's no delight in owning anything unshared.