He who lives according to the guidance of reason strives as much as possible to repay the hatred, anger, or contempt of others towards himself with love or generosity. ...hatred is increased by reciprocal hatred, and, on the other hand, can be extinguished by love, so that hatred passes into love.

The greatest good is the knowledge of the union which the mind has with the whole nature.

In practical life we are compelled to follow what is most probable ; in speculative thought we are compelled to follow truth.

Things could not have been brought into being by God in any manner or in any order different from that which has in fact obtained.

...The body is affected by the image of the thing, in the same way as if the thing were actually present.

The most tyrannical of governments are those which make crimes of opinions, for everyone has an inalienable right to his thoughts.

Freedom is self-determination.