“God is infinite in all His attributes; and which are indeed, Himself, His nature, as has been observed, and are separately considered by us, as a relief to our mind, and helps to our better understanding it. And, perhaps, by observing some of these distinctly, we may have a clearer idea of the infinity of God.
His understanding is infinite, as is expressly said Psalm 147:5, it reaches to and comprehends all things that are, though ever so numerous; to the innumerable company of angels in the highest heavens; to the innumerable stars in the lower ones; to the innumerable inhabitants of the earth, men, beasts, and fowl; and to the innumerable creatures that swim in the sea; yea, not only to all that are in being but to all things possible to be made, which God could have made if He would; these he sees and knows in His eternal mind, so that there is no searching of His understanding, (Isa. 40:28), there is no end of it, and therefore infinite.
The same may be said of His knowledge and wisdom, there is a βαθος, a depth, the apostle ascribes to both; and which is not to be sounded by mortals, (Rom. 11:33); He is a God of knowledge, or knowledges, of all things that are knowable, (1 Sam. 2:3), He is the only and the all-wise God; and in comparison of Him the wisdom of the wisest of creatures, the angels, is but folly, (Job 4:18).
The power of God is infinite; with Him nothing is impossible; His power has never been exerted to the uttermost; He that has made one world, could have made millions; there is no end of His power, and His making of that, proves His eternal power, that is, His infinite power; for nothing but infinite power could ever have made a world out of nothing, (Rom. 1:20, Heb. 11:3).
His goodness is infinite, He is abundant in it, the earth is full of it, all creatures partake of it, and it endures continually; though there has been such a vast profusion of it from the beginning of the world, in all ages, it still abounds: there is no end of it, it is infinite, it is boundless; nor can there be any addition to it; it is infinitely perfect, (Psalm 16:2).
God is infinite in His purity, holiness, and justice: there is none holy as He is; or pure and righteous, with Him; in comparison of Him, the most holy creatures are impure, and cover themselves before Him, (Job 4:17, 18, Isa. 6:2, 3).
In short, He is infinitely perfect, and infinitely blessed and happy. We rightly give Him titles and epithets of immense and incomprehensible, which belong to His infinity. He is immense, that is, unmeasurable; He measures all things, but is measured by none; who can take His dimensions? They are as high as heaven, what canst thou do? Deeper than hell, what canst thou know? If the heavens above cannot be measured, and the foundations of the earth beneath cannot be searched out, how should He be measured or searched out to perfection that made all these? (Job 11:7–9, Jer. 31:37)
As there is an immeasurable height, depth, length and breadth in the love of God, (Eph. 3:18), so there is in every attribute of God, and consequently in His nature. His immensity is His magnitude, and of His greatness it is unsearchable, (Psalm 145:3), and therefore, upon the whole, must be incomprehensible.
His greatness not only cannot be comprehended and circumscribed by space, or in place, for the heaven of heavens cannot contain Him; but He is not to be comprehended by finite minds, that cannot conceive of Him as He is; His omniscience is too wonderful for them, and the thunder of His power who can understand? (Job 26:14)
Something of Him may be apprehended, but His nature and essence can never be comprehended, no not in a state of perfection; sooner may all the waters of the ocean be put into a nutshell, than that the infinite Being of God should be comprehended by angels or men, who are finite creatures.”
–John Gill, A Complete Body of Doctrinal and Practical Divinity: Or A System of Evangelical Truths, Deduced from the Sacred Scriptures (vol. 1, London: Tegg & Company, 1767/1839), 1: 60-61.