To do the same thing over and over again is not only boredom: it is to be controlled by rather than to control what you do.

Those who love wisdom must investigate many things

Doctors cut, burn, and torture the sick, and then demand of them an undeserved fee for such services.

The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day.

Everything flows and nothing abides; everything gives way and nothing stays fixed... Cool things become warm, the warm grows cool; the moist dries, the parched becomes moist... It is in changing that things find repose.

Greater dooms win greater destinies.

Where there is no strife there is decay: 'The mixture which is not shaken decomposes.'