True religion begins with an entrance into the soul of supernatural light and supernatural life. How or why it comes the soul knows not; for "the wind bloweth where it listeth, and 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 wind itself is not seen, but its effects are felt. The sound of a going is heard in the tops of the mulberry trees, where God himself is not seen. The voice of the Lord, powerful and full of majesty, was heard by those who saw no similitude (Deut. 4:12). Thus effects are felt, though causes are unknown.
Streams flow into the heart from a hidden source; rays of light beam into the soul from an unrisen sun; and kindlings of life awake in us a new existence out of an unseen fountain. The new-born babe feels life in all its limbs, though it knows not yet the earthly father whence that natural life sprang. And thus new-born souls are conscious of feelings hitherto unpossessed, and are sensible of a tide of life, mysterious and incomprehensible, ebbing and flowing in their heart, though "Abba, Father," has not yet burst from their lips.
A man's body is alive to every feeling, from a pin's scratch to a mortal wound, from a passing ache to an incurable disease. The heart cannot flutter or intermit for a single second its wonted stroke, without a peculiar sensation that accompanies it, notices it, and registers it. Shall feelings, then, be the mark and evidence of natural life, and not of spiritual? Shall our ignoble part, the creature of a day, our perishing body, our dust of dust, have sensations to register every pain and every pleasure, and be tremblingly alive to every change without and every change within; and shall not our immortal souls be equally endowed with a similar barometer to fluctuate up and down the scale of spiritual life? We must lay it down, then, at the very threshold of vital godliness, that if a man has not been conscious of new feelings, and cannot point out, with more or less precision, some particular period, some never-to-be-forgotten season, when these feelings came unbidden into his heart, he has not yet passed from death unto life. He is not in Christ, if he is not a new creature (2 Cor.5:17).