Not to unlearn what you have learned is the most necessary kind of learning.

I am sadly afraid that I must have done some wicked thing.

Quarrels often arise in marriages when the bridal gifts are excessive.

Observe your enemies, for they first find out your faults.

The most useful piece of learning for the uses of life is to unlearn what is untrue.

Pay attention to your enemies, for they are the first to discover your mistakes.