“Believe on the Lord Jesus Christ, and thou shalt be saved…” – Acts 16:31

And the LORD opened the eyes of the young man; and he saw… – 2 Kings 6:17

When a man begins to see his great enemy, and his best Friend, we may pray, “Lord, open his eyes to see the way of salvation through the appointed Savior.” There is no seeing the Lord Jesus but by His own light. We look to Him with a look which comes from Him. I have tried to explain salvation to people many a time, in simple words and figures; but there is a great deal more wanted than an explanation. It is right to be very plain; but more is needed than a clear statement. No matter how bright the candle, a blind man sees none the better. I continually pray, “Lord, open my mouth”; but I perceive that I must also pray, “Lord, open men’s eyes!” Until God opens a man’s eyes, he will not see what faith means, nor what atonement means, nor what regeneration means. That which is plain as a pikestaff to a seeing man is invisible to the blind. “Believe, and live”; what can be plainer? Yet no man understands it till God gives grace to perceive His meaning. It is our duty, as preachers, to put the gospel as plainly as possible; but we cannot give a man spiritual understanding. We declare, in baldest and boldest terms, “Believe on the Lord Jesus Christ, and thou shalt be saved”; but men ask, like simpletons, “What do you mean?” We cry, “Look unto Jesus, and live”; but when our explainings are over, we learn that they have mistaken our meaning, and are still looking to themselves, and turning their backs on the Lord Jesus. To believe, or trust, is no mystery, but the simplest of all simplicities; and for that very reason men cannot be persuaded to think that we mean what we say, or that God means what He says. We need to pray-“Lord, open their eyes, that they may see; for seeing, they do not see; and hearing, they do not perceive!” Blessed be the Lord, how sweetly they do see it the moment their eyes are opened by His own omnipotent touch! ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2215.cfm