I want to end by reading something Bertolt Brecht wrote that I stumbled across in my twenties:

Nowadays, anyone who wishes to combat lies and ignorance and to write the truth must overcome at least five difficulties. He must have the courage to write the truth when truth is everywhere opposed; the keenness to recognize it, although it is everywhere concealed; the skill to manipulate it as a weapon; the judgement to select in whose hands it will be effective, and the cunning to spread the truth among such persons.

Great piece about John Markoff by Steven Levy