He who can copy can do.

When counting, try not to mix chickens with blessings.

Just as courage is the danger of life, so is fear its safeguard.

There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.

The painter who draws by practise and judgment of the eye without the use of reason is like the mirror which reproduces within itself all the objects which are set opposite to it without knowledge of the same.

I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

Wisdom is the daughter of experience