In speculating on the reasons of this lamentable issue, we must not forget that there is such a thing as an unpurified intellect as well as a corrupt and unregenerate heart. Sin is not restricted to the affections of the lower nature; it has also invaded the realm of thought and reason. The very pursuit of knowledge, noble and elevating as it is commonly esteemed, is not without its dangers of self-delusion and sin. Wherever the love of self is paramount, wherever the object really sought is the delight, the satisfaction, the indulgence of self, no matter in which of the many departments of human life and action, there is sin. It is certain that the intellectual consciousness has its own peculiar pleasures, and those of the keenest and most transporting character; certain that the incessant pursuit of such pleasures may come to absorb the entire energies of a man, so that no room is left for the culture of humility or love or worship. Everything is sacrificed to what is called the pursuit of truth, but is in sober fact a passionate prosecution of private pleasure. It is not truth that is so highly valued; it is the keen excitement of the race, and not seldom the plaudits of the spectators when the goal is won. Such a career may be as thoroughly selfish and sinful and alienated from God as a career of common wickedness. And thus employed or enthralled, no intellectual gifts, however splendid, can bring a man to the discernment of spiritual truth. Not self-pleasing and foolish vanity and arrogant self-assertion, but a self-renouncing humility, an inward purity from idols of every kind, a reverence of truth as divine, are indispensable conditions of the perception of things spiritual. The representation which is often given is a mere travesty. Believers in God do _not_ want to alter His laws by their prayers--neither His laws physical, nor His laws moral and spiritual. It is their chief desire to be brought into submission or perfect obedience to the sum of His laws. They ask their Father in heaven to lead and teach them, to supply their wants in His own way, because He _is_ their Father; because "It is He that made us, and His we are." Surely, a reasonable request, and grounded in reason. To a plain man, seeking for arguments to justify prayer may well seem like seeking a justification of breathing, or eating and drinking and sleeping, or any other natural function. Our Lord never does anything of the kind, because His teaching takes for granted the ultimate prevalence of common sense, in spite of all the subtleties and airspun perplexities, in which a speculative mind delights to lose itself. So long as man has other wants than those which he can himself supply, prayer will be their natural expression.