I am not poor. Poor are those who desire many things.

The good painter must paint two things: a person and the essence of his soul.

It is no small benefit on finding oneself in bed in the dark to go over again in the imagination the main lines of the forms previously studied, or other noteworthy things conceived by ingenious speculation.

We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.

Patience serves as a protection against wrongs as clothes do against cold.

Learning is the only thing the mind never exhausts, never fears, and never regrets.

If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if you have more than one companion you will fall more deeply into the same plight.