Interference by the three classes with each other s jobs, and interchange of jobs between them, therefore, does the greatest harm to our state, and we are entirely justified in calling it the worst of evils.
When the mind's eye rests on objects illuminated by truth and reality, it understands and comprehends them, and functions intelligently; but when it turns to the twilight world of change and decay, it can only form opinions, its vision is confused and its beliefs shifting, and it seems to lack intelligence.
So their combinations with themselves and with each other give rise to endless complexities, which anyone who is to give a likely account of reality must survey.
According to Greek mythology, humans were originally created with four arms, four legs and a head with two faces. Fearing their power, Zeus split them into two separate parts, condemning them to spend their lives in search of their other halves.