The pious Israelite could not indulge a morbidly acute and restlessly speculative intellect with philosophical or scientific theories about the Deity, His nature in Himself, His essential and accidental attributes, His relation to the visible world. Neither did such theories then exist ready made to his hand, nor did his inward impulses and the natural course of thought urge him to pry into such abstruse matters, and with cold irreverence to subject his idea of God to critical analysis. Could he have been made to understand the attitude and the demands of some modern disputants, he would have been apt to exclaim, "Canst thou by searching find out God? Canst thou find out Shaddai unto perfection? It is as high as heaven, what canst thou do? deeper than hell, what canst thou know?" To find out and to know God as the understanding finds out and knows, how can that ever become possible to man? Such knowledge depends entirely upon processes of comparison; upon the perception of similarity between the object investigated and other known objects; upon accurate naming and classification. But who can dream of successfully referring the Deity to a class? "To what will ye liken God, or what likeness will ye compare unto Him?" In the brief prophecy before us, as in the fortieth chapter of Isaiah, with which it presents so many points of contact, we have a splendid protest against all attempts at bringing the Most High within the limitations of human cognition, and reducing God to the category of things known and understood. Directed in the first instance against idolatry--against vain efforts to find an adequate likeness of the Supreme in some one of the numberless creations of His hand, and so to compare and gauge and comprehend Himself,--that protest is still applicable, and with even greater force, against the idolatrous tendencies of the present age: when one school of devotees loudly declares,
"Thou, Nature, art our goddess; to thy law Our services are bound: wherefore should we Stand in the plague of custom?"
and another is equally loud in asserting that it has found the true god in man himself; and another proclaims the divinity of brute force, and feels no shame in advocating the sovereignty of those gross instincts and passions which man shares with the beasts that perish. It is an unworthy and an inadequate conception of God, which identifies Him with Nature; it is a deplorably impoverished idea, the mere outcome of philosophic despair, which identifies him with Humanity; but what language can describe the grovelling baseness of that habit of thought which knows of nothing higher than the sensual appetite, and seeks nothing better than its continual indulgence; which sees the native impress of sovereignty on the brow of passing pleasure, and recognises the image and likeness of God in a temporary association of depraved instincts?
It is to this last form of idolatry, this utter heathenism in the moral life, that all other forms really converge, as St. Paul has shewn in the introduction of his Epistle to the Romans, where, in view of the unutterable iniquities which were familiar occurrences in the world of his contemporaries, he affirms that moral decadence of the most appalling character is ultimately traceable to a voluntary indulgence of those idolatrous tendencies which ignore God's revelation of Himself to the heart and reason, and prefer to find their deity in something less awful in purity and holiness, less averse to the defilements of sin, less conversant with the secrets of the soul; and so, not liking to retain the true and only God in knowledge, change His truth into a lie, and worship and serve the creature more than the Creator: changing the glory of the incorruptible God into an image made like unto corruptible man, or even to birds and fourfooted beasts and creeping things.