The Kingdom of God is Within You by Leo Tolstoy Chapter 5 Page 29

without a slave is less disposed to set him free than ever.

The attitude of the ruling classes to the laborers is that of a man who has felled his adversary to the earth and holds him down, not so much because he wants to hold him down, as because he knows that if he let him go, even for a second, he would himself be stabbed, for his adversary is infuriated and has a knife in his hand.

And therefore, whether their conscience is tender or the reverse, our rich men cannot enjoy the wealth they have filched from the poor as the ancients did who believed in their right to it. Their whole life and all their enjoyments are embittered either by the stings of conscience or by terror.

So much for the economic contradiction. The political contradiction is even more striking.