The nature of God is infinite in every regard. His being is without limit; his attributes are boundless. Given the fact that He is without bounds or limits upon His nature, it necessarily follows that He is incomprehensible to the limited mind of sinful man. We are so utterly bound by time and space, not to mention fettered by sin, that it is impossible that we should be able to grasp the vastness of the divine nature. Paul no doubt expressed somewhat of this when he spoke about God to Timothy: “Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see” (1 Tm. 6.16). Not only are we utterly unable to comprehend the infinity of God because of our sinfulness; but even apart from that, man is of a different nature from God. He is infinite; we are finite. Even our non-corporeal parts – soul and spirit – cannot be said to be infinite. When my soul and spirit are transported to heaven after my death, I will then be there in those glorious mansions, and not here in this land of sin and sorrow. My being, even then, will be specific as to location. That cannot be said of God, whom even the heavens cannot contain.
The fact that God is infinitely greater in nature than we are ought to make us approach Him only with the greatest reverence. Though we can have great boldness because of the fact that we have a great high Priest who intercedes for us, we must at the same time realize to whom we are speaking. This is the Creator of heaven and earth, the incomprehensible I AM THAT I AM. It would be the greatest of presumption on our part to pray as though we were addressing a fellow creature.
Though God cannot be fully comprehended by us, it would be wrong for us to say that we can know nothing about Him. He has revealed much about Himself to us, enough to occupy the greatest of minds for a lifetime. Even a man as brilliant as John Gill was famously non-committal on many passages of Scripture, giving several possible interpretations of a passage, but not giving any firm opinion of his own, for a full understanding of them was beyond even his great mind.
How good our God is to have revealed anything of Himself to us! We ought to dedicate ourselves to a greater understanding of His nature, His works, and especially His great salvation.