"The heavens declare the glory of God; and the firmament sheweth his handywork. Day unto day uttereth speech, and night unto night sheweth knowledge." (Psalm 19:1-2)
This familiar psalm, extolling God's creation (vv. 1-6) and God's word (vv. 7-14), begins with a beautiful summary of the testimony of the physical universe. "The heavens" and the "firmament" are synonymous (Genesis 1:8), both being equivalent to our modern scientific concept of space. The "glory of God" refers to His infinite power, or energy, and "his handywork" implies the infinite variety and complexity of physical systems, or matter, in the universe. This interaction of matter and energy occurs everywhere throughout space, but also has to operate and be understood in the context of time, "day unto day" and "night unto night."
The entire marvelous complex of space/time/matter/energy is continually "uttering speech" and "showing knowledge," teaching men and women of all times and places that there is a great Creator God who made it all. "The invisible things of him from the creation of the world are clearly seen" (Romans 1:20).
The boundless space, the endless time, the infinite energies, and the innumerable complexities of the matter of the universe all unite in irrefutable testimony to the God of creation. The most fundamental principle of science, as well as the most universal rule of human experience, is the Law of Cause and Effect, stating that no effect can transcend its cause. Thus the great cause of the universe must be infinite, eternal, omnipotent and omniscient. And since we as living, feeling persons are able to think about all this, that cause must also be a living, feeling, thinking person. This is the great lesson engraved on the textbook of the universe for all to read and learn. The whole creation, indeed, declares the glory of God. HMM