The Universe in all the elements of its existence is the sign of God. Its coming into existence from nothingness and the enormous variety found in it indicates His vast powers. The utmost meaningfulness in all things reflects His quality of mercy. The existence of destructive things like lightning acquaints us with how God takes punitive actions. The revival of greenery on earth after its being dry and barren demonstrates re-creation and resurrection. All these are the signs of God. But these signs are only for those who lend their ears to the silent call of the Universe—for those who put their wisdom and their knowledge to the correct use.