To overextend yourself is to invite defeat.

— G. William Domhoff

The most instructive G. William Domhoff quotes that are glad to read

There is more to American politics than fat cats and their political friends.

There are serious-minded liberals who fight the good fight on many issues, ecologically oriented politicians who remain true to their cause, and honest people of every political stripe who are not beholden to any wealthy people. But there are not enough of them, and they are often worn down by the constant pressure from lobbyists, lawyers and conventional politicians.