He who cannot see the truth for himself, nor, hearing it from others, store it away in his mind, that man is utterly worthless.

To love someone is to identify with them.

Property should be in a general sense common, but as a general rule private... In well-ordered states, although every man has his own property, some things he will place at the disposal of his friends, while of others he shares the use of them.

For one swallow does not make a summer, nor does one day; and so too one day, or a short time, does not make a man blessed and happy.

In educating the young we steer them by the rudders of pleasure and pain

Phronimos, possessing practical wisdom . But the only virtue special to a ruler is practical wisdom; all the others must be possessed, so it seems, both by rulers and ruled. The virtue of a person being ruled is not practical wisdom but correct opinion; he is rather like a person who makes the pipes, while the ruler is the one who can play them.

... the science we are after is not about mathematicals either none of them, you see, is separable.