“The wind blows where it wants, and you hear the sound thereof, but can not tell from where it comes, and where it goes: so is everyone that is born of the Spirit.” John 3:8.

 The wind is heard among the branches of the trees, rustling the leaves and flowers; yet it is invisible, and no man knows whence it comes or whither it goes. So with the work of the Holy Spirit upon the heart. It can no more be explained than can the movements of the wind. A person may not be able to tell the exact time or place, or to trace all the circumstances in the process of conversion, but this does not prove him to be unconverted. By an agency as unseen as the wind, Christ is constantly working upon the heart. Little by little, perhaps unconsciously to the receiver, impressions are made that tend to draw the soul to Christ. –The Desire of Ages, p. 172.

Though we cannot see the Spirit of God, we know that men who have been dead in trespasses and sins become convicted and converted under its operations. The thoughtless and wayward become serious. The hardened repent of their sins, and the faithless belief. The gambler, the drunkard, the licentious, become steady, sober, and pure. The rebellious and obstinate become meek and Christlike. When we see these changes in the character, we may be assured that the converting power of God has transformed the entire man. We saw not the Holy Spirit, but we saw the evidence of His work on the changed character of those who were hardened and obdurate sinners. As the wind moves in its force upon the lofty trees and brings them down, so the Holy Spirit can work upon human hearts, and no finite man can circumscribe the work of God. –Ye Shall Receive Power, p. 29.