Explain the short story- The Soft Voice ofe Serpent?

A story about a healthy 26 year old man who has lost his left leg. He is struggling to accept the loss "...never quite let the realization reach him" but one day, while in the garden he feels that he has met someone who is in the same boat- a locust that has also lost a leg. He feels that he can feel exactly how the locust does but in the end is irritated when the locust flies away. He has forgotten that the locust can fly and therefor the locust, like the serpent in Eden, has misled the man into thinking he feels the same pain and loss.