The desire to sacrifice an entire lifetime to the noblest of ideals serves no purpose if one works alone.
...I also know - and this won't alter the course of history or your personal view of me - that you will die with a clenched fist and a tense jaw, the epitome of hatred and struggle, because you are not a symbol (some inanimate example) but a genuine member of the society to be destroyed; the spirit of the beehive speaks through your mouth and motivates your actions. You are as useful as I am, but you are not aware of how useful your contribution is to the society that sacrifices you.
Imperialism has been defeated in many partial battles. But it remains a considerable force in the world, and we cannot expect its final defeat save through effort and sacrifice on the part of all of us.