Having opened correspondence with the Eternal Environment, the subsequent stages are in the line of all other normal development. We have but to continue, to deepen, to extend, and to enrich the correspondence that has been begun. And we shall soon find to our surprise that this is accompanied by another and parallel process. The action is not all upon our side. The Environment also will be found to correspond. The influence of Environment is one of the greatest and most substantial of modern biological doctrines. Of the power of Environment to form or transform organisms, of its ability to develop or suppress function, of its potency in determining growth, and generally of its immense influence in Evolution, there is no need now to speak. But Environment is now acknowledged to be one of the most potent factors in the Evolution of Life. The influence of Environment, too, seems to increase rather than diminish as we approach the higher forms of being. The highest forms are the most mobile; their capacity of change is the greatest; they are, in short, most easily acted on by Environment. And not only are the highest organisms the most mobile, but the highest parts of the highest organisms are more mobile than the lower. Environment can do little, comparatively, in the direction of inducing variation in the body of a child; but how plastic is its mind! How infinitely sensitive is its soul! How infallibly can it be tuned to music or to dissonance by the moral harmony or discord of its outward lot! How decisively indeed are we not all formed and moulded, made or unmade, by external circumstance! Might we not all confess with Ulysses,--
"I am a part of all that I have met?"
Much more, then, shall we look for the influence of Environment on the spiritual nature of him who has opened correspondence with God. Reaching out his eager and quickened faculties to the spiritual world around him, shall he not become spiritual? In vital contact with Holiness, shall he not become holy? Breathing now an atmosphere of ineffable Purity, shall he miss becoming pure? Walking with God from day to day, shall he fail to be taught of God?
Growth in grace is sometimes described as a strange, mystical, and unintelligible process. It is mystical, but neither strange nor unintelligible. It proceeds according to Natural Law, and the leading factor in sanctification is Influence of Environment. The possibility of it depends upon the mobility of the organism; the result, on the extent and frequency of certain correspondences. These facts insensibly lead on to further suggestion. Is it not possible that these biological truths may carry with them the clue to a still profounder philosophy--even that of Regeneration?
Evolutionists tell us that by the influence of environment certain aquatic animals have become adapted to a terrestrial mode of life. Breathing normally by gills, as the result and reward of a continued effort carried on from generation to generation to inspire the air of heaven direct, they have slowly acquired the lung-function. In the young organism, true to the ancestral type, the gill still persists--as in the tadpole of the common frog. But as maturity approaches, the true lung appears; the gill gradually transfers its task to the higher organ. It then becomes atrophied and disappears, and finally respiration in the adult is conducted by lungs alone. [1] We may be far, in the meantime, from saying that this is proved. It is for those who accept it to deny the justice of the spiritual analogy. Is religion to them unscientific in its doctrine of Regeneration? Will the evolutionist who admits the regeneration of the frog under the modifying influence of a continued correspondence with a new environment, care to question the possibility of the soul acquiring such a faculty as that of Prayer, the marvellous breathing-function of the new creature, when in contact with the atmosphere of a besetting God? Is the change from the earthly to the heavenly more mysterious than the change from the aquatic to the terrestrial mode of life? Is Evolution to stop with the organic? If it be objected that it has taken ages to perfect the function in the batrachian, the reply is, that it will take ages to perfect the function in the Christian. For every thousand years the natural evolution will allow for the development of its organism, the Higher Biology will grant its product millions. We have indeed spoken of the spiritual correspondence as already perfect--but it is perfect only as the bud is perfect. "It doth not yet appear what it shall be," any more than it appeared a million years ago what the evolving batrachian would be.
[1] _Vide_ also the remarkable experiments of Fraeulein v. Chauvin on the Transformation of the Mexican Axoloti into Amblystoma.--Weismann's "Studies in the Theory of Descent," vol. ii. pt. iii.