For civilization is built on man's morals not on brute force (as Germany learned to her sorrow), and I fight for the moral law as long as there is any fight left in me.
Nature planned that when the cat ate the mother robin, the young robins in the nest must starve.

Nature had other robins that would escape the enemy.

But among men it is wrong for the little ones to suffer when the hand that feeds them is destroyed.

For man has sympathy, which beasts have not.

Sympathy is the iron fiber in man that welds him to his fellows.