Quote from : Speaker for the Dead Book

When a brother is given the right to pass into the third life as a father, then he chooses his greatest rival or his truest friend to give him passage. You. Speaker—ever since I first learned Stark and read , I waited for you. I said many times to my father, Rooter, of all humans he is the one who will understand us. Then Rooter told me when your starship came, that it was you and the hive queen aboard that ship, and I knew then that you had come to give me passage, if only I did well." "You did well, Human.