The Qur'an tells that man was destined to be the Khalif of all beings, which can be rightly understood when we see that all beings in the world serve man, are being controlled and ruled by him, obeying his command. The secret of their nature is disclosed to him, that he may use them for the purpose for which they are meant. Moreover it is man who may rightly be called the seed of God, for in him alone intelligence develops so perfectly that he not only appreciates God's works and worships Him, but he is even enabled to attain self-sufficiency and all-pervading consciousness of the everlasting life of God. Man realizes his perfection in God, and God realizes His perfection in man.