I will see if I can explain them to you. Every one will admit that a nature having in perfection all the qualities which we required in a philosopher, is a rare plant which is seldom seen among men.

Rare indeed.

And what numberless and powerful causes tend to destroy these rare natures!

What causes?

In the first place there are their own virtues, their courage, temperance, and the rest of them, every one of which praiseworthy qualities (and this is a most singular circumstance) destroys and distracts from philosophy the soul which is the possessor of them.

That is very singular, he replied.

Then there are all the ordinary goods of life — beauty, wealth, strength, rank, and great connections in the State —