All the darkness in the world can't put out the light of one candle.

To prefer it is better than to only know it. To delight in it is better than merely to prefer it.

If I hold up one corner of a square and the student cannot workout the other three for himself, I won't go any further.

Don't worry if people don't recognize your merits; worry that you may not recognize theirs.

Without an acquaintance with the rules of propriety, it is impossible for the character to be established

Which demands a lot of himself and some others, will be free from hatred.

To rein a kingdom efficiently it is necessary, before all, to put into good order the family. It's impossible for a man who doesn't know how to lead his own family to know how to lead a country.