(2) The Spirit like the wind is _invisible but none the less perceptible and real and mighty_. You hear the sound of the wind (John iii. 8) but the wind itself you never see. You hear the voice of the Spirit but He Himself is ever invisible. (The word translated “sound” in John iii. 8 is the word which elsewhere is translated “voice.” See R. V.) We not only hear the voice, of the wind but we see its mighty effects. We feel the breath of the wind upon our cheeks, we see the dust and the leaves blowing before the wind, we see the vessels at sea driven swiftly towards their ports; but the wind itself remains invisible. Just so with the Spirit; we feel His breath upon our souls, we see the mighty things He does, but Himself we do not see. He is invisible, but He is real and perceptible. I shall never forget a solemn hour in Chicago Avenue Church, Chicago. Dr. W. W. White was making a farewell address before going to India to work among the students there. Suddenly, without any apparent warning, the place was filled with an awful and glorious Presence. To me it was very real, but the question arose in my mind, “Is this merely subjective, just a feeling of my own, or is there an objective Presence here?” After the meeting was over, I asked different persons whether they were conscious of anything and found that at the same point in the meeting they, too, though they saw no one, became distinctly conscious of an overwhelming Presence, the Presence of the Holy Spirit. Though many years have passed, there are those who speak of that hour to this day. On another occasion in my own home at Chicago, when kneeling in prayer with an intimate friend, as we prayed it seemed as if an unseen and awful Presence entered the room. I realized what Eliphaz meant when he said, “Then a spirit passed before my face; the hair of my flesh stood up” (Job iv. 15). The moment was overwhelming, but as glorious as it was awful. These are but two illustrations of which many might be given. None of us have seen the Holy Spirit at any time, but of His presence we have been distinctly conscious again and again and again. His mighty power we have witnessed and His reality we cannot doubt. There are those who tell us that they do not believe in anything which they cannot see. Not one of them has ever seen the wind but they all believe in the wind. They have felt the wind and they have seen its effects, and just so we, beyond a question, have felt the mighty presence of the Spirit and witnessed His mighty workings.
(3) The Spirit like the wind is _inscrutable_. “Thou canst not tell whence it cometh and whither it goeth.” Nothing in nature is more mysterious than the wind. But more mysterious still is the Holy Spirit in His operations. We hear of how suddenly and unexpectedly in widely separated communities He begins to work His mighty work. Doubtless there are hidden reasons why He does thus begin His work, but often-times these reasons are completely undiscoverable by us. We know not whence He comes nor whither He goes. We cannot tell where next He will display His mighty and gracious power.
(4) The Spirit, like the wind, is _indispensable_. Without wind, that is “air in motion,” there is no life and so Jesus says, “Verily, verily, I say unto you, except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.” If the wind should absolutely cease to blow for a single hour, most of the life on this earth would cease to be. Time and again when the health reports of the different cities of the United States are issued, it has been found that the five healthiest cities in the United States were five cities located on the great lakes. Many have been surprised at this report when they have visited some of these cities and found that they were far from being the cleanest cities, or most sanitary in their general arrangement, and yet year after year this report has been returned. The explanation is simply this, it is the wind blowing from the lakes that has brought life and health to the cities. Just so when the Spirit ceases to blow in any heart or any church or any community, death ensues, but when the Spirit blows steadily upon the individual or the church or the community, there is abounding spiritual life and health.