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.

Make your work to be in keeping with your purpose

One can have no smaller or greater mastery than mastery of oneself.

Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.

The first object of the painter is to make a flat plane appear as a body in relief and projecting from that plane

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.

Who would believe that so small a space could contain the images of all the universe?