George William Russell

By intensity of hatred, nations create in themselves the character that they imagine in their enemies. Hence it comes that all passionate conflicts result in an interchange of characteristics. We might say with truth, those who hate open a door by which their enemies enter and make their own the secret places of the heart.

What do cells do when they see a broken piece of DNA? Cells don't like such breaks. They'll do pretty much anything they can to fix things up. If a chromosome is broken, the cells will repair the break using an intact chromosome.