In the reversal pair Ose Ofu and Ofu Ose, Afa corpus reveals a deep lesson about cause and effect; what drains a person's light often enters long before the draining becomes visible. While Ose Ofu points to the activity of Ndi Amosu, those who interfere with or feed upon the energy of others, Ofu Ose points to the doorway through which such influence gains access: the consumption of what is spiritually, energetically, or physically harmful. Through this reversal, Afa teaches that effects rarely stand alone; behind every manifestation lies a preceding condition that empowered it. The wise diviner therefore looks beyond the visible problem to identify the hidden cause, understanding that removing the source often weakens the effect.

In Afa, Ofu Ose describes bad nourishment as anything harmful that is accepted and absorbed into one's life. Ofu represents integration and internalization, while Ose represents openness and reception. Together, they explain how unhealthy food, ideas, habits, or influences can become part of a person's condition. This teaching shows that good wellbeing depends not only on what we consume physically, but also on what we allow into our minds and spirits.