De Somniis (lib. i-ii)

What then? Do we not think that even in ourselves there is a herd of irrational cattle, inasmuch as the irrational multitude of the soul is deprived of reason, and that the shepherd is the governing mind? But as long as that is vigorous and competent to act as the manager of the herd, everything goes on in a just, and prosperous, and advantageous manner;

but when any weakness or want of power supervenes to the king, then it follows of necessity that the subjects also labour with a like infirmity; and when they most completely seem to be in enjoyment of liberty, then they are a prize, lying most entirely ready for any one who pleases to contend for it to seize; for the natural course is for anarchy to be treacherous, and for government to be salutary, especially in a state where law and justice are honoured. And this is such a state as is consistent with reason.