An aristocratic House is only powerful in an aristocratic state of society.
 John Stuart Mill, Considerations on Representative Government (1861). copy citation

Context

“But its efficacy in this respect wholly depends on the social support which it can command outside the House. An assembly which does not rest on the basis of some great power in the country is ineffectual against one which does. An aristocratic House is only powerful in an aristocratic state of society. The House of Lords was once the strongest power in our Constitution, and the Commons only a checking body; but this was when the barons were almost the only power out of doors. I can not believe that, in a really democratic state of society, the House of Lords would be of any practical value as a moderator of democracy.” source