“Love is a complicated business,” said Father. “For every time I felt sorry for you about losing your mother, I’ve felt sorry for myself five times over. Don’t beat yourself up because your brain thinks about you more than about other people. The selfishness of the human brain is how our species has survived.” “You always told me we survive by cooperation,” said Ezekiel. “Didn’t say our motives were pure, did I?” asked Father.