Men of lofty genius when they are doing the least work are most active.

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.

When you are alone you are all your own.

The motive power is the cause of all life.

The painter will produce pictures of little merit if he takes the works of others as his standard.

Art is the queen of all sciences communicating knowledge to all the generations of the world.

A good memory, which nature has endowed us with, causes things long past to seem present.