As iron is eaten away by rust, so the envious are consumed by their own passion.

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The investigation of the meaning of words is the beginning of education.

As iron is eaten by rust, so are the envious consumed by envy.

There are only two people who can tell you the truth about yourself - an enemy who has lost his temper and a friend who loves you dearly.

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

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

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

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

When brothers agree, no fortress is so strong as their common life.

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

The most necessary learning is that which unlearns evil.