Wellbeing is attained by little and little, and nevertheless is no little thing itself.
Man conquers the world by conquering himself.
A bad feeling is a commotion of the mind repugnant to reason, and against nature.
Better to trip with the feet than with the tongue
All things are parts of one single system, which is called nature; the individual life is good when it is in harmony with 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.