" The law of God is not to return evil for evil;
indeed, if you try in this way to stamp out wickedness
it will come upon you all the stronger. It is not difficult
for you to kill the man, but his blood will surely stain
your own soul. You may think you have killed a bad
man--that you have gotten rid of evil--but you will soon
find out that the seeds of still greater wickedness have
been planted within you. "

― Leo Tolstoy , Eleven Stories