It is easier to resist at the beginning than at the end.

Weight, force and casual impulse, together with resistance, are the four external powers in which all the visible actions of mortals have their being and their end.

As a well-spent day brings happy sleep, so a life well used brings happy death.

Simplicity is the ultimate sophistication.

There are three classes of people: those who see, those who see when they are shown, those who do not see.

Where the spirit does not work with the hand, there is no art.