Humanity is the equity of the heart.
Look at the means which a man employs, consider his motives, observe his pleasures. A man simply cannot conceal himself!
Study as though you cannot catch up to it, and as though you fear you are going to lose it.
Waste begets self-will; thrift begets meanness: but better be mean than self-willed.
Real knowledge is to know the extent of one's ignorance.
A blemish may be removed from a diamond by careful polishing, but evil words once spoken cannot be effaced.