The old man is tender-hearted and patient. He doesn’t criticize the kid for his emotions surrounding his first kill. At the same time, he expects the kid to follow through on the responsibilities of the kill. On another note, this is the first time it’s stated that the old man doesn’t share the kid’s Indian heritage, which means that he’s limited in how much he can teach Frank about who he is. While recognizing that this is a real limitation, the old man also acknowledges that he can teach Frank much that’s valuable about being “a good man.”