Read here the Moral roundly writ
For him that into battle goes—
Each soul that, hitting hard and hit
Encounters gross or ghostly foes:—
Prince, blown by many overthrows
Half blind with shame, half choked with dirt,
Man cannot tell, but Allah knows
How much the other side was hurt.

Notes on the text

Prince, blown by …   The envoi in the ballade form was traditionally addressed to a prince.  [D.H.]

Man cannot tell, but Allah knows… Suffering in conflict one does not know how much the enemy is suffering.