The body needs three things in this world: food, clothing, and shelter. Food is for nourishment, clothing and shelter are for cold and heat, to prevent them from killing him. A person’s needs for his body are no more than these; indeed these are the foundations of the world.
The key to the knowledge of Divine Beauty is knowledge of the wonders of Divine handiwork. And the (five) human sensory organs are the first key to the Divine handiwork. These senses would not have been possible, save in this body compounded of water and earth.
In this manner, the vocations of the world multiplied and became interrelated. The people lost themselves among them and did not know that the root of all these was no more than three things: food, clothing, and shelter. All of this became necessary for (satisfying) these three needs, and these three are necessary for the body, and the body is necessary for the heart, to serve as its vehicle. The heart is necessary for God. But they forget themselves and they forget God, like the pilgrim who forgets himself, the Kabah, and (the object of) his journey and spends all his time taking care of his camel!
 Ibn Khaldun. Al-Muqaddimah, trans. Franz Rosenthal (Princeton: Princeton University Press 2005).
 Aristotle. Nicomachean Ethics, Book VI, translated by W.D. Ross in: The Complete Works of Aristotle: The Revised Oxford Translation, Jonathon Barnes, ed. (Princeton University Press, 1984).
 Al-Ghazali, Abu Hamid Muhammad Tusi. Alchemy of Happiness, Jay R. Cook (trns.) (Chicago, 2005), 60.
 al-Ghazali, Alchemy of Happiness, 59.
 al-Ghazali, Alchemy of Happiness, 61-62.
 al-Ghazali, Alchemy of Happiness, 62.