Which line from William Butler Yeats’s The Second Coming most plainly contains apocalyptic imagery?

The best lack all conviction while the worst/Are full of passionate intensity
A shape with lion and the head of a man/ A gaze blank and pitiless
Surely some revelation is at hand/Surely the Second Coming is at hand
While all about it/Reel shadows of the indignant desert birds

A shape with lion and the head of a man/ A gaze blank and pitiless