Read the lyrics of the song “Battle Hymn of the Republic.” 
Mine eyes have seen the glory
 of the coming of the lord, 
He is trampling out the vintage
 where the grapes of wrath are stored, 
He hath loosed his fateful lightning
 of His terrible swift sword, 
His truth is marching on
Glory! Glory! Hallelujah! Glory! Glory! Hallelujah 
Glory! Glory! Hallelujah! His truth is marching on  
I have seen Him in the watch fires 
of a hundred circling camps, 
They have builded Him an altar 
in the evening dews and damps, 
I can read his righteous sentence 
in the dim and daring lamps, 
His day is marching on  
Glory! Glory! Hallelujah! Glory! Glory! Hallelujah 
Glory! Glory! Hallelujah! His truth is marching on  
I have read a fiery Gospel 
writ in burnished rows of steel, 
"As ye deal with My contemners so with you My grace shall deal," 
Let the Hero born of woman 
crush the serpent with His heel, 
Since God is marching on  
Glory! Glory! Hallelujah! Glory! Glory! Hallelujah 
Glory! Glory! Hallelujah! His truth is marching on  
He has sounded forth the trumpet 
that shall never call retreat, 
He is sitting out the hearts of men 
before His judgment seat, 
Oh, be swift, my soul, to answer Him! 
Be jubilant, my feet, 
Our God is marching on  
Glory! Glory! Hallelujah! Glory! Glory! Hallelujah 
Glory! Glory! Hallelujah! His truth is marching on  
Explain in a few sentences how this song might express the feelings and emotions of Northerners during Reconstruction.