Though I do not think I'm very good at managing myself. Though I might be an OK leader.
This passage is discussing the idea that good people do not want to hold public office because they do not want to be seen as hirelings who are only interested in payment, or as thieves who are secretly enriching themselves at the expense of the public. The author argues that good people are not ambitious and do not care about honor, so they must be forced to serve out of fear of punishment. The worst punishment, according to the author, is the fear of being ruled by someone who is worse than oneself. This fear is what ultimately compels good people to take office, even though they do not want to and do not expect to benefit from it. The author suggests that good people take office out of a sense of necessity, because they are not able to entrust the task of ruling to anyone who is better than themselves.
There's a passage in Platos' Republic which is illuminating about this particular circumstance.
And I quote from [1].
""" 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.
And this, as I imagine, is the reason why the forwardness to take office, instead of waiting to be compelled, has been deemed dishonourable.
Now the worst part of the punishment is that he who refuses to rule is liable to be ruled by one who is worse than himself.
And the fear of this, as I conceive, induces the good to take office, not because they would, but because they cannot help --not under the idea that they are going to have any benefit or enjoyment themselves, but as a necessity, and because they are not able to commit the task of ruling to any one who is better than themselves, or indeed as good. """
Stuff that was true two millenia ago, still continues to be the same.
[1] - http://classics.mit.edu/Plato/republic.mb.txt