Each problem that I solved became a rule which served afterwards to solve other problems.

The wise man should restrain his senses like the crane and accomplish his purpose with due knowledge of his place, time and ability.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

A good teacher protects his pupils from his own influence.

Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

Where you stand depends on where you sit.

Tis very certain the desire of life prolongs it.

In order to change the world, you have to get your head together first

Do not say a little in many words, but a great deal in few!

Think no vice so small that you may commit it, and no virtue so small that you may over look it.

If you do not know the laws of right conduct, you cannot form your character.

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.

The only way to get the best of an argument is to avoid it.

It’s your road and yours alone. Others may walk it with you, but no one can walk it for you.

Great acts are made up of small deeds.

Science has not yet taught us if madness is or is not the sublimity of the intelligence.

If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.

The lie is a condition of life.

There is a wisdom of the head, and... there is a wisdom of the heart.

What can't be cured must be endured.