True Christian doctrine begins with the fact that God is and that He is the living God. He is the I AM (Yahweh) of biblical revelation (John 1:1). As the living God, enduring forever, His kingdom shall never be destroyed, and His dominion has no end (Daniel 6:26). As stated by the theologian Francis Schaeffer, "He is the God who is there." God is Spirit. As Spirit, He infinitely transcends the created order. He is present everywhere. He is invisible. God is uncreated, uncaused, independent, and self-sufficient. Everything in our existence is contingent upon His being. God is, by His very nature, self-existent, and He causes all other existence. He presents Himself as Triune (three distinct Persons, but One in essence).