A full list of quotes is here:
http://en.wikipedia.org/wiki/With_us_or_against_us. This one from
Lenin is interesting in particular I think for the verbosity that
accompanies its delivery: "It is with absolute frankness that we speak
of this struggle of the proletariat; each man must choose between
joining our side or the other side. Any attempt to avoid taking sides
in this issue must end in fiasco."