Between the desire And the spasm Between the potency And the existence Between the essence And the descent Falls the Shadow (lines 84-89)
The Hollow Men suffer from moral paralysis – the inability to act or follow through on any of their natural feelings and capabilities. Have you ever experienced this problem in some area of your life?
This is the way the world ends Not with a bang but a whimper. (lines 97-98)
Because the Hollow Men can never act, except on behalf of their own narrow interests, their lives just fizzle out into a meaningless moan of unhappiness. You could think of the whole poem as their "whimper" of complaint.