Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when He shall appear, we shall be like Him; for we shall see Him as He is. – 1 John 3:2

Blessed be God, there is this to be said, that he who has once seen Christ shall always see Him. The eye may sometimes gather dimness, but the light shall yet return. Where Christ hath opened a blind eye, blindness comes not back again. He takes the cataract totally away. He does not give a transient gleam of spiritual sight, and then permit the soul to go back into the darkness of its grave; but the sight which He gives is the sight of things eternal, a sight which shall strengthen and grow until at the last, when death shall take away every barrier which parts us from the unseen world, we shall know even as we are known and see even as we are seen. To see Jesus! ‘Tis heaven begun! And heaven consummated is but to see Jesus, no longer through a glass darkly, but face to face-still it is to see Jesus, to behold the King in His beauty. This, I say, is the sum and substance of life eternal, and it is true life here below.

Sometimes it is ours to speak to you of death, not necessarily with gloom, for it is to the Christian illuminated with rays of heavenly light; but here and now we desire to speak of life, the best and divinest life; we will forget the raven with its dusky wing, and see only the tender, gentle dove, bearing for each one of us the olive-branch of peace and victory.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3401.cfm