Horatius at the Bridge in the Movie Darkest Hour

In the movie "Darkest Hour", Winston Churchill is depicted as reciting a part of the poem "Horatius at the Bridge", by Thomas Babington, Lord Macaulay.  Here are the lines quoted in the movie (stanzas 217 to 224):

Then out spake brave Horatius,   
  The Captain of the gate:   
“To every man upon this earth   
  Death cometh soon or late.
And how can man die better   
  Than facing fearful odds   
For the ashes of his fathers   
  And the temples of his gods,

This is the spirit of heroism.

Robert