Life well spent is long.

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

Men wrongly lament the flight of time, blaming it for being too swift; they do not perceive that its passage is sufficiently long, but a good memory, which nature has given to us, causes things long past to seem present.

Every part is disposed to unite with the whole, that it may thereby escape from its own incompleteness.

There shall be wings! If the accomplishment be not for me, 'tis for some other. The spirit cannot die; and man, who shall know all and shall have wings.

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

Perspective is the rein and rudder of painting.