Numbers are the highest degree of knowledge. It is knowledge itself.

... the good are not willing to rule either for the sake of money or of honor.

Any city, however small, is in fact divided into two, one the city of the poor, the other of the rich; these are at war with one another.

He whom Love touches not walks in darkness.

No man should bring children into the world who is unwilling to persevere to the end in their nature and education.

Those who have a natural talent for calculation are generally quick-witted at every other kind of knowledge; and even the dull, if they have had an arithmetical training, although they may derive no other advantage from it, always become much quicker than they would have been.

Arithmetic is a kind of knowledge in which the best natures should be trained, and which must not be given up.