Lenin on reforms , ultra-leftism

"To carry on a war for the overthrow of the international bourgeoisie," says Lenin, "a war which is a hundred times more difficult, protracted, and complicated than the most stubborn of ordinary wars between states, and to refuse beforehand to manoeuvre, to utilise the conflict of interests (even though temporary) among one's enemies, to reject agreements and compromises with possible (even though temporary, unstable, vacillating and conditional) allies-is not this ridiculous in the extreme? Is it not as though, when making a difficult ascent of an unexplored and hitherto inaccessible mountain, we were to refuse beforehand ever to move in zigzags, ever to retrace our steps, ever to abandon the course once selected and to try others?" (see Vol. XXV, p. 210).