The wind blows wherever it pleases.  You hear its sound, but you cannot tell where it comes from or where it is going.  So it is with everyone born of the Spirit.”— John 3: 8.

     In condescension to the infirmity of our nature, God clothes his spiritual truth in material forms, making the kingdom of nature, which is seen, illustrate for us the kingdom of Christ, which is not seen. The greatest teacher of spiritual truth that ever lived cast nearly all his instruction in the form of parables.  In like manner, when the Scriptures would give us some insight into the character and phases of the third person of the Trinity, they do it by a series of emblems drawn from the natural world.  One emblem of the Spirit is that of fire, the illuminating agency in the world, as the Spirit is the only agency that can drive away the darkness of sin and let in the sunlight of God.  Another emblem of the Spirit is water, the universal cleansing agent, as the Spirit is the only power that can cleanse us from the pollution of sin.  Another emblem is oil, the old-time medicine, as the Spirit is the only being in the universe to bind up the broken heart; also oil is the consecrating element, and we cannot become kings and priests unto God until we have the Holy Spirit.  But the most remarkable emblem of the Holy Spirit is the wind.  There are three great points about the Holy Spirit stated in this verse which our Lord obtruded upon the mind of Nicodemus.  The wind and the Spirit are both invisible to man, they are both indispensable to him, and they are both independent of him.

W. W. Moore.