While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal. – 2 Corinthians 4:18

The presence of Jesus Christ on earth would have been, to a great extent, a perpetual embargo upon the life of faith. We should all have desired to see the Redeemer; but since, as man, He could not have been omnipresent, but could only have been in one spot at one time, we should have made it the business of our lives to provide the means for journeying to the place where He might be seen; or if He himself condescended to journey through all lands, we should have fought our way into the throng to feast our eyes upon Him, and we should have envied each other when the turn came for any to speak familiarly with Him. Thank God we have no cause for clamor or strife or struggle about the mere sight of Jesus after the flesh; for though once He was seen corporeally by His disciples, yet now after the flesh know we even Him no more. Jesus is no more seen of human eyes; and it is well, for faith’s sight is saving, instructing, and transforming, but mere natural sight is not so. Had He been here we should have regarded much more the things which are visible, but now our hearts are taken up with the things which are not seen, but which are eternal. This day we have no priest for eyes to gaze upon, no material altar, no temple made with hands, no solemn rites to satisfy the senses; we have done with the outward and are rejoicing in the inward. Neither in this mountain nor in that do we worship the Father, but we worship God, who is a Spirit, in spirit and in truth. We now endure as seeing Him who is invisible; whom, having not seen, we love; in whom, though now we see Him not, yet believing, we rejoice with joy unspeakable and full of glory…In an unseen Savior we fix our trust, from an unseen Savior we derive our joy. Our faith is now the substance of things hoped for, the evidence of things not seen. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0982.cfm