The reason why we have two ears and only one mouth is that we may listen the more and talk the less.
All things are parts of one single system, which is called nature; the individual life is good when it is in harmony with nature.
Steel your sensibilities, so that life shall hurt you as little as possible.
Man conquers the world by conquering himself.
A bad feeling is a commotion of the mind repugnant to reason, and against nature.
That which exercises reason is more excellent than that which does not exercise reason; there is nothing more excellent than the universe, therefore the universe exercises reason.