One can have no smaller or greater mastery than mastery of oneself.
Instrumental or mechanical science is the noblest and above all others, the most useful.
Drawing is based upon perspective, which is nothing else than a thorough knowledge of the function of the eye.
Vows begin when hope dies.
The five senses are the ministers of the soul.
Study without desire spoils the memory, and it retains nothing that it takes in.