I do not consider myself a Maoist, but this is one of my favorite pamphlets written by Mao, entitled "COMBAT LIBERALISM!"
It defined the very essense of Liberalism as a manifestation of Opportunism, in a VERY down to earth and fascinating way.
Its a must read for any anti-Revisionist reguardless of your personal beliefs as to what exactly revisionism is, (be you Marxist-Leninist, Maoist, or a follower of Juche)
http://www.marxists.org/reference/ar...2/mswv2_03.htm