The Tragedy of Known Truth: Rejecting what they recognized in their own book.
When the Qur'an came, confirming the Prophet whom they had long expected based on their own scripture, they disbelieved out of envy and arrogance. Do not let envy or self-interest prevent acceptance of truth. Recognizing something as good or true, yet rejecting it because it benefits a rival or challenges our position, is a profound and inexcusable spiritual failure.