"Only one thing is needed to enable us to march forward more surely
and more firmly to victory: namely, the full and complete thought of our
appreciation by all communists
in all countries of the necessity of displaying the utmost flexibility
in their tactics. The strictest loyalty to the ideas of communism must
be combined with the ability to make all the necessary practical
compromises, to attack, to make agreements, zigzags, retreats, etc." [Lenin, Left Wing Communism, 1920].