Insomuch that the multitude wondered, when they saw the dumb to speak, the maimed to be whole, the lame to walk, and the blind to see: and they glorified the God of Israel. – Matthew 15:31

O sweet light, how precious art thou to blind eyes, when they are newly opened. You do not know what it is to be blind: thank God that you do not: there are some here, however, who painfully know what constant darkness is; it is a grievous privation: but when their eyes are opened, as they will be in another state, and they see that best of sights, the King in His beauty, how sweet will light be to them!

So, when the spiritual eye has long been dim, and we have mourned and wept for sin, but could not beheld a Savior, light is sweet beyond expression. And, because it is so sweet, there is a necessity within the enlightened soul to tell out the joyful news to others. When a man has deeply felt the evil of sin, and has at length obtained mercy, he cries with David, “Then will I teach transgressors Thy ways, and sinners shall be converted unto Thee.” John Bunyan’s impulse when he found the Savior was to tell the crows on the ploughed ground about it, and he lived to do better than talk to crows, for day by day, from generation to generation, his works proclaim the Friend of sinners, who leads them from the City of Destruction to the Celestial glory. Zealous saints are usually those who once were in great darkness; they see what grace has done for them, and for that very reason they feel an attachment to their dear Lord and Master, which they might never had felt if they had not once sat in the valley of the shadow of death. So, poor troubled ones, for these reasons, and fifty more I might bring if time did not fail me, there is hope for you. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1010.cfm