Analysis of Sunset

WHAT horror lurked within the First Man's brain
 As downward to the West the Sun-god stepped,
 And paused upon the hill-ridge, ere he leapt
 Headlong into the night! What cold, dumb pain
 He felt, as still he marked the twilight wane,
 And on the dragon Darkness crept and crept,
 While beating in his mind the question kept,
 “Is this Earth's all? Can Day e'er come again?”  
  And yet, last night, one watched with listless eyes
 The stricken Sun-god struggling in his gore,
 With wasting red bedabbled, unto whom
 Life's joyous sun shall nevermore uprise:
 His dream of light has faded, gloried o'er;
 His night has come—a night of endless gloom.