Vanity keeps persons in favor with themselves who are out of favor with all others.

I hold the world but as the world, Gratiano; A stage where every man must play a part, And mine is a sad one.

What is aught but as 'tis valued?

There is a history in all men's lives.

The sense of death is most in apprehension.

Gratiano speaks an infinite deal of nothing, more than any man in all Venice. His reasons are as two grains of wheat hid in two bushels of chaff: you shall seek all day ere you find them, and when you have them, they are not worth the search.

The whirligig of time brings in his revenges.