What important concepts are illustrated by the farewell feast?

Okonkwo's feast is in keeping with his greatness. He needs to be as generous to his mother's clan as they have been to him. He also is celebrating finally being allowed to return to his homeland. The chapter ends on an ominous note, foreshadowing the threats to the Igbo. The elder's speech, placed at the end of the chapter, which is also the end of Part Two, hints that Okonkwo's return to Umuofia may be far more difficult than he had hoped.