What proverb does okonkwo no longer believe. Why?

Okonkwo no longer believes in the proverb "A man is judged by the strength of his chi," which reflects the belief in personal fate and success. His transformation is driven by his experiences, particularly his exile and the loss of his status, leading him to feel that external circumstances and societal changes have more power over his life than his personal strength or determination. This disillusionment highlights his internal conflict and the broader themes of change and identity in the face of colonial influence.