What does it mean that God is self-existent?

The concept of God's self-existence is critical in understanding His nature and attributes. Unlike created beings, God is entirely self-sufficient; He does not rely on any external factors to fulfill His purposes or to maintain His existence. This is rooted in His name, Jehovah, meaning 'I Am.' This self-existence affirms that God is unchangeable and absolute in power and knowledge. He acts according to His will without needing any external influences. Consequently, believers can be assured that God's plans and promises are founded on His eternal nature, making them trustworthy and reliable.