A knavish speech sleeps in a fool's ear.

A learned fool is more a fool than an ignorant fool.

The compassionate person does not require other people to be stupid, in order to be intelligent. Their intelligence is for everyone, so as to have a world in which there is less ignorance. (118)

Old fools are babes again.

When we are born, we cry that we are come to this great stage of fools.

Humor can get in under the door while seriousness is still fumbling at the handle.