The only thing that is constant is change.
History is a child building a sand-castle by the sea, and that child is the whole majesty of man's power in the world.
Where there is no strife there is decay: 'The mixture which is not shaken decomposes.'
The only thing constant is change
We circle in the night and we are devoured by fire.
Could you tell night from day? No, I regard all such distinctions as logically impossible.