I fear this is not the right exchange to attain virtue, to exchange pleasures for pleasures, pains for pains and fears for fears, the greater for the less like coins, but that the only valid currency for which all these things should be exchanged is wisdom.

... for this discovery of yours will create forgetfulness in the learners' souls, because they will not use their memories; they will trust to the external written characters and not remember of themselves.

Do not expect justice where might is right.

The qualities of number appear to lead to the apprehension of truth.

When a person supposes that he knows, and does not know; this appears to be the great source of all the errors of the intellect.

Is there anything worse for a state than to be split and disunited? or anything better than cohesion and unity?

'But the man who is ready to taste every form of knowledge, is glad to learn and never satisfied - he's the man who deserves to be called a philosopher, isn't he?'