True opinions are a fine thing and do all sorts of good so long as they stay in their place; but they will not stay long. They run away from a man's mind, so they are not worth much until you tether them by working out the reason. Once they are tied down, they become knowledge, and are stable.

Education is teaching our children to desire the right things.

The doctors will treat those of your citizens whose physical and psychological constitution is good: as for the others, they will leave the unhealthy to die and those whose psychological constitution is incurably warped they will be put to death.

What if the man could see Beauty Itself, pure, unalloyed, stripped of mortality, and all its pollution, stains, and vanities, unchanging, divine,... the man becoming in that communion, the friend of God,... ?

For a man to conquer himself is the first and noblest of all victories.

Complacent ignorance is the most lethal sickness of the soul

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.