Simplicity is the ultimate sophistication.

As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.

When Fortune comes, seize her in front with a sure hand, because behind she is bald.

Thou, O God, dost sell us all good things at the price of labor.

Never make heads straight on the shoulders, but turn them aside to the right or to the left, even though they look down, or upward, or straight ahead, because it is necessary for them to look lively and awake and not asleep. And do not depict the front or rear half of the whole person so that too much straightness is displaced, one half above or below the other half; and if you should wish to use stiff figures, do so only in portraying old people.

Therefore, O students, study mathematics and do not build without foundations.