God is self-existent according to several Bible passages. Isaiah 44:24 says God stretched out the heavens and spread out the earth alone. Acts 17:25 implies God does not need anything since He gives life and breath to all. Romans 11:33-36 teaches that God's judgments and ways are unsearchable, and that from, through, and to Him are all things. The passages establish that God exists in and of Himself alone, without needing anything to exist, and that He is the source and sustainer of all creation.