Leonardo da Vinci

The human foot is a masterpiece of engineering and a work of art.

The Medici created and destroyed me.

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

O neglectful Nature, wherefore art thou thus partial, becoming to some of thy children a tender and benignant mother, to others a most cruel and ruthless stepmother? I see thy children given into slavery to others without ever receiving any benefit, and in lieu of any reward for the services they have done for them they are repaid by the severest punishments.

Wisdom is the daughter of experience.

O Lord, Thou givest us everything, At the price Of an effort.

Make your work to be in keeping with your purpose.

Let proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.

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

You will never have a greater or lesser dominion than that over yourself. . . . the height of a man's success is gauged by his self-mastery; the depth of his failure by his self-abandonment. . . . And this law is the expression of eternal justice. He who cannot establish dominion over himself will have no dominion over others.