Wherever good fortune enters, envy lays siege to the place and attacks it; and when it departs, sorrow and repentance remain behind.
A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.
Small rooms or dwellings discipline the mind, large ones weaken it.
Threats alone, are the weapons of the threatened man.
Whoever does not respect life, does not deserve it.
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.