We are fighting a constant battle to be happy with life.
It doesn’t care about the white flag you wave so vigorously. It sees and hears no surrender.
You may win some battles, but it always comes back with new, more powerful weapons. Weapons designed specifically for your weaknesses. Suddenly, your impenetrable front comes crashing down.
At some point we all lose the war to life. It comes to an end when we grow weary of the constant battle for happiness, and begin to find the darkness just as comforting as the light.