Practical sciences proceed by building up; theoretical science by resolving into components.

He who achieves power by violence does not truly become lord or master.

The principal act of courage is to endure and withstand dangers doggedly rather than to attack them.

The celestial bodies are the cause of all that takes place in the sublunar world.

It would be superfluous to receive by faith, things that can be known by natural reason

An act of love always tends towards two things; to the good that one wills, and to the person for whom one wills it.

The test of the artist does not lie in the will with which he goes to work, but in the excellence of the work he produces.