The prosperous can not easily form a right idea of misery.
For all the best teachers pride themselves on having a large number of pupils and think themselves worthy of a bigger audience.
Our minds are like our stomaches; they are whetted by the change of their food, and variety supplies both with fresh appetite.
Ambition is a vice, but it may be the father of virtue.
Without natural gifts technical rules are useless.
Nothing is more dangerous to men than a sudden change of fortune.