This book explores the constant of natural existence, the principle that governs the perennial emergence of the world. As understood in Judaism, Christianity, and Islam, this principle is "creation" in the sense that everything in the universe comes into existence through the creative command of God. Thus the past, present, and future of nature can be explained by the same fundamental metaphysical tenet. The principle of creation is explored here in the context of Islamic metaphysical tradition and the Qur'anic discourse. Drawing parallels to the contemporary Christian theology, this book aims to help readers better understand God's creative command in terms of both its essence and effect.