English poem
_The Worst Of Enemies_
by John Kendrick Bangs (1862–1922)
I DO not fear an enemy Who all his days hath hated me.
I do not bother o'er a foe Whose name and face I do not know.
I mind me not the small attack Of him who bites behind my back:
But Heaven help me to the end 'Gainst that one who was once my friend.