“Lord, thou hast been our dwelling place in all generations. Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God.”
Psalm 90:1, 2
God has always been and will always be. He was when nothing else was. Before there was an earth or sea or any living creature, there was God. He has no beginning. He is “from everlasting to everlasting.” Time has no affect on God. He causes time and controls time, but He is not subject to time. To God, a thousand years is as a day, and a day is as a thousand years. Because God is eternal, all of His attributes are eternal. His nature is without beginning or end. God always will be what He always has been. God could not be infinitely perfect, immutable or unchanging if He were not eternal. God could not be the Creator of all if He were not eternal. He is the cause of all things. Because God is eternal, past, present, and future are the same for Him.
It is natural for man to think primarily in terms of time, rather than eternity. We are uncertain about what the future holds, but God knows tomorrow as well as He knows today or yesterday. God will never be surprised. We can trust Him completely with our tomorrows because He is eternal. The eternality of God brings into focus the brevity of mortal life. Compared to eternity, our earthly lives are too short to measure.
There is much in the Bible that encourages us to think more in terms of eternity. When we begin to make decisions for eternity rather than time, we will be living more as we should live in this life. We must train our minds to think and live in light of eternity. For instance, Jesus tells us not to lay up for ourselves treasures upon earth, but to lay up treasures in Heaven.
The eternity of God also helps us appreciate the providence that dictated that we would be living in this generation. Why are we here at this moment of time? Because God is eternal, He could have had us live in any generation of time. But in His wisdom, He destined us to be alive today.
Because God is eternal, He is able to bestow upon His creation the great gift of eternal life. Because He has no end, His promises to us are eternal. His covenant of eternal life is founded on His eternal being. Because of His grace, we have assurance of an eternity in the glory of His eternal presence.