And Elisha prayed, and said, LORD, I pray thee, open his eyes, that he may see. And the LORD opened the eyes of the young man; and he saw: and behold, the mountain was full of horses and chariots of fire round about Elisha. – 2 Kings 6:17

Only by His power can men be made to see. This we found in our own experience. In vain we struggled to behold the salvation of God; in vain we sought the help of godly people; no sight came to our souls, nor were the eyes of our understanding enlightened, until the Lord Himself laved our eyes in the waters that go softly. Then we came seeing. And this we also discover when we try to lead others to the light. We speak to them of the glories we ourselves behold and set before them the truth of God; but we cannot make them see. To bestow spiritual vision is as great a wonder as to make a world and requires the same fiat of omnipotence. Only He who created the eye can give this second sight. “Since the world began was it not heard that any man opened the eyes of one that was born blind?” What folly, then, to attempt the greater task of bestowing the sight of the heart! How vain the boast of those who attempt to invade God’s prerogative and imagine that human ordinances or observances can open blind eyes! Beloved, let us, after we have done our best to make the people see the glory of the gospel, ever fall back on the God of the gospel, and entreat Him to do His own blessed work. Do not try to hold up your tallow candles to reveal the chariots of fire nor parade your vain philosophy, as if that could clear away the darkness of the soul. Leave room for God to work; and, in a moment, at the touch of His finger, in response to the prayers of His people, the wondrous work shall be accomplished. The very fact that we feel drawn to pray for them, is already a token to us that, ere long, the scales shall fall from their eyes; and through their vision of the splendor and sufficiency of the provision that God hath made for those who trust in Him, the name of the Lord will be greatly glorified. Therefore, with much expectancy, we again utter our prayer, “Lord, open their eyes, that they may see!” ~ C.H. Spurgeon

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