I. Spontaneousness. There are three lines along which one may seek for evidence of the spontaneousness of growth. The first is Science. And the argument here could not be summed up better than in the words of Jesus. The lilies grow, He says, of themselves; they toil not, neither do they spin. They grow, that is, automatically, spontaneously, without trying, without fretting, without thinking. Applied in any direction, to plant, to animal, to the body or to the soul this law holds. A boy grows, for example, without trying. One or two simple conditions are fulfilled, and the growth goes on. He thinks probably as little about the condition as about the result; he fulfills the conditions by habit, the result follows by nature. Both processes go steadily on from year to year apart from himself and all but in spite of himself. One would never think of _telling_ a boy to grow. A doctor has no prescription for growth. He can tell me how growth may be stunted or impaired, but the process itself is recognized as beyond control--one of the few, and therefore very significant, things which Nature keeps in her own hands. No physician of souls, in like manner, has any prescription for spiritual growth. It is the question he is most often asked and most often answers wrongly. He may prescribe more earnestness, more prayer, more self-denial, or more Christian work. These are prescriptions for something, but not for growth. Not that they may not encourage growth; but the soul grows as the lily grows, without trying, without fretting, without ever thinking. Manuals of devotion, with complicated rules for getting on in the Christian life, would do well sometimes to return to the simplicity of nature; and earnest souls who are attempting sanctification by struggle instead of sanctification by faith might be spared much humiliation by learning the botany of the Sermon on the Mount. There _can_ indeed be no other principle of growth than this. It is a vital act. And to try to _make_ a thing grow is as absurd as to help the tide to come in or the sun rise.
Another argument for the spontaneousness of growth is universal experience. A boy not only grows without trying, but he cannot grow if he tries. No man by taking thought has ever added a cubit to his stature; nor has any man by mere working at his soul ever approached nearer to the stature of the Lord Jesus. The stature of the Lord Jesus was not itself reached by work, and he who thinks to approach its mystical height by anxious effort is really receding from it. Christ's life unfolded itself from a divine germ, planted centrally in His nature, which grew as naturally as a flower from a bud. This flower may be imitated; but one can always tell an artificial flower. The human form may be copied in wax, yet somehow one never fails to detect the difference. And this precisely is the difference between a native growth of Christian principle and the moral copy of it. The one is natural, the other mechanical. The one is a growth, the other an accretion. Now this, according to modern biology, is the fundamental distinction between the living and the not living, between an organism and a crystal. The living organism grows, the dead crystal increases. The first grows vitally from within, the last adds new particles from the outside. The whole difference between the Christian and the moralist lies here. The Christian works from the center, the moralist from the circumference. The one is an organism, in the center of which is planted by the living God a living germ. The other is a crystal, very beautiful it may be; but only a crystal--it wants the vital principle of growth.