Aseity means that God is self-existent. God does not depend on or require anything outside of Himself to exist eternally. God is eternal because that's who He is. He is the Alpha and Omega, beginning and the end; the first and last. Who was, Who is and Who is to come. The Great I Am. Always existing in an eternal present form. God is NOT dead. God cannot die or cease to exist. He is always here and always near; ever-present, all-knowing and all-powerful. Nothing can or will ever change that. That's why He is God.
We, on the other hand, require much to stay alive. We need oxygen, food, shelter, love, intellect, strength and the list goes on. We need these things to survive. If not we fail to live. We are finite beings, meaning we have boundaries that we cannot cross; limits that keep us maintained in a specific order. Every day we live is a blessing from God. Every morning we wake we should take the time to praise God for giving us another day and ask Him for guidance and wisdom to get us through the day in a way that would bring Him glory. Every night before we go to bed we should thank Him for getting us through the day, sustaining us and providing for us. As it is, for so many of us, day in and day out we tend to overlook our 100% total dependence on God, failing to thank Him in detail for all the good things He gives us. In the same way, how often do we fail to recognize His total independence and praise Him for the Great and Mighty God He is? Take some time today to thank Him for His blessings and let Him know how much you need Him and don't forget to praise Him for the great God that He is.
"The Son is the radiance of God's glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven." (Hebrews 1:3)