3531 In the physical world, the sky and the earth, as we see them, stand unsupported, by the artistry of Allah. They bear witness to Allah, and in-that our physical life depends on them-the earth for its produce and the sky for rain, the heat of the sun, and other phenomena of nature-they call to our mind our relation to Allah Who made them and us. How can we then be so dense as not to realise that our higher Future-our Ma'ad-is, bound up with the call and the mercy of Allah!