Commentaries:
It is beyond our ability to understand how a Being could be at the center of His creation—and we know a little bit about the awesome size of His creation. We are able to see the earth and the billions of people on it. How does God keep track of all that? It is too great. It is too high. But He does it, we know, by His Spirit.
John W. Ritenbaugh
The Right Use of Power
Omnipresence is an eternal attribute of God. He is omnipresent through His Holy Spirit, the same boundless power that provides for His omnipotence (Jeremiah 32:17; Zechariah 4:6).
David understood and made the connection between God's presence and His Holy Spirit. “Do not cast me away from Your presence, and do not take Your Holy Spirit from me” (Psalm 51:11). Because God is everywhere, He sees and hears us—just as He saw and heard David—personally (John 2:24-25). He is always present in all places through His Spirit. God is never confined but is present in all His power at every point in space and time. David addressed this attribute directly when he asked: “Where can I go from Your Spirit? Or where can I flee from Your presence?” (Psalm 139:7).
Martin G. Collins
God's Non-Transmittable Attributes (Part Two): Omnipresence
Other Forerunner Commentary entries containing Psalms 139:1:
1 John 5:14-15