"The dread oppresses him, he may be deprived of his empire and yet be powerless."

To this statement (not the one above) Hiero made answer: And I, for my part, O Simonides,
would find it hard to state, outside the list of things which you have
named yourself, in what respect the despot can have other channels of
perception. (12) So that up to this point I do not see that the despotic
life differs in any way at all from that of common people.

 (12) i.e. "being like constituted, the autocratic person has no other
    sources of perception: he has no claim to a wider gamut of
    sensation, and consequently thus far there is not a pin to choose
    between the life of the despot and that of a private person."

Then Simonides: Only in this respect it surely differs, in that the
pleasures which the "tyrant" enjoys through all these several avenues
of sense are many times more numerous, and the pains he suffers are far
fewer.

To which Hiero: Nay, that is not so, Simonides, take my word for it; the
fact is rather that the pleasures of the despot are far fewer than
those of people in a humbler condition, and his pains not only far more
numerous, but more intense. 

- Xenophon, Hieron 

It's page 4 on the e-book version at Project Gutenberg