The most necessary learning is that which unlearns evil..

The advantages of philosophy? That I am able to hold converse with myself..

States are doomed when they are unable to distinguish good men from bad..

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

As rust corrupts iron, so envy corrupts man..

I'd rather be mad than feel pleasure..

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

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

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

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

We weed out the darnel from the corn and the unfit in war, but do not excuse evil men from the service of the state..

Wealth and poverty do not lie in a man's estate, but in men's souls..

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

It is better to fall in with crows than with flatterers; for in the one case you are devoured when dead, in the other case while alive..

It is better to fall among crows than flatterers; for those devour only the dead - these the living..

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

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

It is a royal privilege to do good and be ill spoken of..

We must not contradict, but instruct him that contradicts us; for a madman is not cured by another running mad also..

How to get rid of having anything to unlearn..

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..