Every new form of struggle

"Every new form of struggle, accompanied as it is by new dangers and new sacrifices, inevitably "disorganises" organisations which are unprepared for this new form of struggle. Our old propagandist circles were disorganised by recourse to methods of agitation. Our committees were subsequently disorganised by recourse to demonstrations. Every military action in any war to a certain extent disorganises the ranks of the fighters. But this does not mean that one must not fight. It means that one must learn to fight. That is all."

V. I. Lenin - Guerrilla Warfare, 1906