And this is the reason, my dear Thrasymachus, why, as I was just now saying, no one is willing to govern; because no one likes to take in hand the reformation of evils which are not his concern without remuneration.

For, in the execution of his work, and in giving his orders to another, the true artist does not regard his own interest, but always that of his subjects; and therefore in order that rulers may be willing to rule, they must be paid in one of three modes of payment, money, or honour, or a penalty for refusing.
What do you mean, Socrates?
said Glaucon.

The first two modes of payment are intelligible enough, but what the penalty is I do not understand, or how a penalty can be a payment.
You mean that you do not understand the nature of this payment which to the best men is the great inducement to rule?
Of course you know that ambition and avarice are held to be, as indeed they are, a disgrace?
Very true.
And for this reason, I said, money and honour have no attraction for them; good men do not wish to be openly demanding payment for governing and so to get the name of hirelings, nor by secretly helping themselves out of the public revenues to get the name of thieves.

And not being ambitious they do not care about honour.

Wherefore necessity must be laid upon them, and they must be induced to serve from the fear of punishment.