Parmenides: It is impossible to conceive of many without one. - Plato

He who is of a calm and happy nature will hardly feel the pressure of age. But to him who is of an opposite disposition, youth and age are equally a burden.

They do not know the penalty of unrighteousness, which is the thing they most ought to know. For it is not what they think it is—scourgings and death, which they sometimes escape entirely when they have done wrong—but a penalty which it is impossible to escape… Two patterns, my friend, are set up in the world, the divine, which is most blessed, and the godless, which is most wretched… and their silliness and extreme foolishness blind them to the fact that through their unrighteous acts they are made like the one and unlike the other. They therefore pay the penalty for this by living a life that conforms to the pattern they resemble.

There will be no end to the troubles of the state or indeed of humanity until philosophers become kings or until those we now call kings really and truly become philosophers.