And the firmament shows His handiwork.
Day unto day utters speech,
And night unto night reveals knowledge. --PSALM 19:1-2
The essential truth was presented, namely that the God of Creation is one God, in three Persons—Father, Son, and Holy Spirit.
This is arguably the most important doctrine of Christianity—certainly the most distinctive. This DOES NOT mean that there are three Gods; there is only ONE God who created Heaven and Earth and everything in them. The term "God" as used in the Bible most commonly refers to the Father, but the Son and the Holy Spirit are each also recognized as God. This concept is so difficult for many to accept that some have argued that the three divine Persons are not really three distinct individuals but merely three modes in which the one God can express Himself as occasion demands.
But this also is a false invention. There are many accounts of the Father and Son and Holy Spirit speaking to each other, for example. The doctrine of the Trinity is admittedly difficult (in fact impossible) to comprehend fully with our minds, but it is taught so definitely in God's Word that we believe it with our hearts.
Skeptics can deride the Trinity doctrine as mathematically impossible. One plus One plus One does not equal One, but three. Nevertheless, the Bible reveals God to be a Trinity—one God in three Persons. Are we naïve and credulous to believe such a thing?
Well, not really. It is also a remarkable fact that the divine Trinity, the tri-une God, has created a great universe which is itself a trinity, with each of its three components also structured as trinities. This would not necessarily prove that God is a Trinity, but it is a fact that needs explanation. Could God have created it as a model (or type, or analogy) that would help people understand His own Nature, at least in some degree?
Consider: The created universe is actually a tri-universe of Space, Matter, and Time, each permeating and representing the whole. However, the universe is not partly composed of space, partly of matter, and partly of time (like, for example, the three sides of a triangle). A trinity is not a trio or a triad, but a tri-unity, with each part comprising the whole, yet all three required to make the whole. Thus, the universe is all Space, all Time, and all Matter (including energy as a form of matter); in fact, many scientists speak of it as a Space-Matter-Time continuum.
Furthermore, note the parallels between the divine trinity and the tri-universe in terms of the logical order of its three components. Space is the invisible, omnipresent background of everything in the universe. Matter-and-Energy reveal the reality of the universe. Time makes the universe understandable in the events occurring in it. Note that exactly the same sentence will apply if the words Father, Son, and Holy Spirit replace the words, Space, Matter, and Time.
Space itself is also a tri-unity, comprised of three dimensions, (height, width and depth) with each dimension permeating all space. The reality of any portion of space is obtained by multiplying the three dimensions together (the "mathematics of the Trinity" is not 1+1+1=1, but rather 1x1x1=1). Further, Space is identified in the first dimension seen in the second dimension, experienced in the third dimension. The same sentence could be used with Father, Son, and Spirit replacing first, second, and third dimensions.
Similarly, Time is future, present, and past. The future is the unseen source of time, manifest moment-by-moment in the present and understood in the past. Again substitute Father, Son, and Spirit.
Finally, Matter is unseen, omnipresent Energy, manifesting itself in various forms of measurable motion, then experienced in corresponding phenomena. For example, light energy generates light waves, which are experienced in the seeing of light. Sound energy generates sound waves which we experience when we hear sound.
Thus, the physical universe is a great "trinity of trinities," with the inner relationships of each element modeling the relationships of Father, Son, and Holy Spirit. All of this (as cautioned above) does not prove that God is a Trinity, but it certainly is a remarkable fact. It is an amazing effect, which can at least seemingly be explained on the assumption that God is a tri-une God, and has made His creation to reflect Himself. In fact it is very hard to explain any other way.
These trinities pervading the creation may not be perfect reflections of the Creator. But they are good and realistic models of the tri-une God who made them.
It would seem there must be some good explanation for this remarkable fact other than coincidence. A plausible explanation would surely seem to be that they were deliberately created by God to help us understand, in at least some small degree, His own tri-une nature