II. But, secondly, besides this Spontaneousness there is this other great characteristic of Growth--Mysteriousness. Upon this quality depends the fact, probably, that so few men ever fathom its real character. We are most unspiritual always in dealing with the simplest spiritual things. A lily grows mysteriously, pushing up its solid weight of stem and leaf in the teeth of gravity. Shaped into beauty by secret and invisible fingers, the flower develops we know not how. But we do not wonder at it. Every day the thing is done; it is Nature, it is God. We are spiritual enough at least to understand that. But when the soul rises slowly above the world, pushing up its delicate virtues in the teeth of sin, shaping itself mysteriously into the image of Christ, we deny that the power is not of man. A strong will, we say, a high ideal, the reward of virtue, Christian influence--these will account for it. Spiritual character is merely the product of anxious work, self-command, and self-denial. We allow, that is to say, a miracle to the lily, but none to the man. The lily may grow; the man must fret and toil and spin. Now grant for a moment that by hard work and self-restraint a man may attain to a very high character. It is not denied that this can be done. But what is denied is that this is growth, and that this process is Christianity. The fact that you can account for it proves that it is not growth. For growth is mysterious; the peculiarity of it is that you cannot account for it. Mysteriousness, as Mozley has well observed, is "the test of spiritual birth." And this was Christ's test. "The wind bloweth where it listeth. Thou hearest the sound thereof, but canst not tell whence it cometh or whither it goeth, _so is every one that is born of the Spirit_." The test of spirituality is that you cannot tell whence it cometh or whither it goeth. If you can tell, if you can account for it on philosophical principles, on the doctrine of influence, on strength of will, on a favorable environment, it is not growth. It may be so far a success, it may be a perfectly honest, even remarkable, and praiseworthy imitation, but it is not the real thing. The fruits are wax, the flowers artificial--you can tell whence it cometh and whither it goeth.