As an illustration of this, we cannot do better than refer to a recent production[11] of the Agnostic School, in which there is the most emphatic testimony to the blessed power of Christianity in particular instances, followed by these most candid and generous words: "What needs admitting, or rather proclaiming, by agnostics who would be just, is that the Christian doctrine has the power of elevating and developing saintliness, which has had no equal in any other creed or philosophy." Yet the book in which that sentence occurs assumes throughout that this doctrine, which has had no equal in producing saintliness--a quality which in another place is described as "so lofty, so pure, so attractive, that it ravishes men's souls"--is untrue! Is, then, the argument of our Lord out of date? and is it too late to ask the old question, "Can Satan cast out Satan?"
It does not always follow, of course, that that which is good in its effects in particular cases, is thereby proved to be true. Truth and falsehood are to be determined fundamentally on other grounds than those of proved utility--this applies alike to truth and duty; there is an absolute truth and falsehood quite irrespective of utility, and there is an absolute right and wrong quite irrespective of utility,--but though we cannot in particular cases prove that to be true which appears to be beneficial, yet we cannot but believe that in the end, the true, the good, and the beautiful will be found to coincide; and we maintain that, seeing the effects of genuine Christianity on human character have been tested for nearly two thousand years, and have been found to "make for righteousness," nobility, purity, all that is good and gracious, high and holy, it is too late in the day to set it down to the father of lies. We may be mistaken in our passing judgments, may be misled into accepting as eternally true and right some measure or doctrine which has not yet had time to develop its real nature and character, which may produce good results at first, and then by degrees develop other results of quite a contrary kind--take the history of Monasticism as a case in point; but when there has been ample time and opportunity for testing the fruits of a system, as there has been in the case of Christianity; when we observe that the gospel of Christ has had these wonderful effects through eighteen successive centuries among all ranks and classes, nations and races of men--it ought surely to require something stronger than Agnosticism (which at the worst can only say, "I do not know") to make us believe the outrageously improbable supposition that it is false, and therefore presumably of the kingdom of lies and of unclean things. There have been too many devils cast out of human hearts to make it at all doubtful that in very deed "the kingdom of God has come" among us (ver. 28). There has been too much spoiling of "the strong man's goods" to make it at all doubtful that "a stronger than he" has mastered him and is spoiling his house. "The Son of God was manifested, that He might destroy the works of the devil" (1 John iii. 8); and wherever He has been admitted into human hearts He has done it, setting up His kingdom of "righteousness and peace and joy in the Holy Ghost." The argument is as fresh to-day as the day it was propounded; and it has now all the added strength of centuries of confirmation.
The third attack gave our Lord the opportunity of laying bare the root of unbelief, and setting forth the important truth that, when the heart is estranged from God, mere signs are unavailing. The signs He had given in abundance should have been enough, especially when the only way of evading their force the ingenuity of scepticism could devise had been closed by the powerful argument just delivered. Besides this there was the crowning sign of the resurrection still to come; yet He knew that even that would fail to satisfy--not for reasons intellectual, but because of the spirit of the age, as He points out in that striking and powerful parable (vv. 43-45), and hints in the suggestive term, "an evil and adulterous generation" (ver. 39), the word "adulterous" referring to the well-known, and at that time thoroughly understood, language of the Old Testament, according to which estrangement of heart from God is branded as spiritual adultery. (See Jeremiah iii., Hosea i., ii., and many other passages.)