So by deceit Satan brought about their downfall. They tasted of the tree of discord and started to divide into branches. (Personal interest dominated their minds rather than the collective good of all. Humanity began to fall into mutual contention). Soon their imperfections became obvious and they tried to conceal them in vain with superficial courtesy. Then came a reminder from their Lord, "Did I not forbid you that tree and tell you that Satan is your open enemy?"