What does Nwakibie mean when he says, "You will have what is good for you and i will have what is good for me. Let the kite perch and let the eagle perch too. If one says no to the other let his wing break"?

He is alluding to giving him twice the number of seeds expected because, unlike many young men, Okonkwo isn’t afraid of hard work. He says they can help each other by using the metaphor of the birds. He says that if one bird denies another, it will be a bad omen. Unfortunately, because of the draught and floods, the whole enterprise does not work too well.