If someone separated the art of counting and measuring and weighing from all the other arts, what was left of each (of the others) would be, so to speak, insignificant.

What a poor appearance the tales of poets make when stripped of the colours which music puts upon them, and recited in simple prose.

Between knowledge of what really exists and ignorance of what does not exist lies the domain of opinion. It is more obscure than knowledge, but clearer than ignorance.

The wise man will want to be ever with him who is better than himself.

He who is not a good servant will not be a good master.

Reality is created by the mind, we can change our reality by changing our mind.

It is correct to make a priority of young people, taking care that they turn out as well as possible.