There exists a law, not written down anywhere but inborn in our hearts; a law which comes to us not by training or custom or reading but by derivation and absorption and adoption from nature itself; a law which has come to us not from theory but from practice, not by instruction but by natural intuition. I refer to the law which lays it down that, if our lives are endangered by plots or violence or armed robbers or enemies, any and every method of protecting ourselves is morally right.
Though liberty is established by law, we must be vigilant, for liberty to enslave us is always present under that very liberty. Our Constitution speaks of the "general welfare of the people." Under that phrase all sorts of excesses can be employed by lusting tyrants to make us bondsmen.
There is a difference between justice and consideration in one's relations to one's fellow men. It is the function of justice not to do wrong to one's fellow men of considerateness, not to wound their feelings.