 The chi manifests as "ḿmúọ́", spirits, and as a person's spirit is earth-bound it chooses sex, type, and lifespan before incarnation in the human world.Chi is the personal spirit of a person ("ḿmúọ́").In Igbo culture it is this spirit which determines destiny, hence the saying, "onye kwe, Chi ya ekwe" ("If a person agrees to a thing, his spirit agrees also").