"But the Ibo people have a proverb that when a man says yes his chi says yes also."

The Igbo people believe that a person's will is strong enough to change and control their destiny. 

The chi is comparable to a guardian angel; it controls one's failures and shortcomings as well as achievements and triumphs.

The Igbo people believe that their path is predetermined by their chi and that no human can rise above the destiny chosen by their chi. 

This quote is powerful because it states that a man's willpower and determination are strong enough to alter the path set by their chi.