So Christ was once offered to bear the sins of many… – Hebrews 9:28

Our Lord Jesus Christ has once appeared, and though He will appear again, it will not be for the same purpose. On His first appearing fix your thoughts; for the like of it will never be seen again. In the bosom of the Father He lay concealed as God; as the second person of the divine Trinity in Unity He could not be seen, for “no man hath seen God at any time.”…In the manger He might be seen with the eyes, and looked upon, and handled; for there the Word was made flesh, and God was incarnate. He whom the ages could not contain, the glorious One who dwelt with the Father for ever unseen, now appeared within the bounds of time and space, and humble shepherds saw Him, and adored Him. By Gentiles he was seen; for wise men from the East beheld and worshipped Him whose star had led them. As He grew up, the children of Nazareth beheld Him as a child obedient to His parents; and by-and-by He was made manifest to men by the witness of John and the descent of the Holy Ghost upon Him at His baptism…He dwelt among us, and we beheld His glory: He was the revelation of God to men, so that He could say, “He that hath seen Me hath seen the Father.” He was made still more manifest by His death; for in His crucifixion He was lifted up from the earth, that all might behold Him. He was exalted upon the cross, even as Moses lifted up the serpent in the wilderness, on purpose that whosoever looked to Him might live…Thus we may look into His inmost heart. High on the cross the Saviour hung, without veil or curtain to conceal Him. “Once in the end of the world hath He appeared.” I know of no appearance that could have been more complete, more unreserved. He moved in the midst of crowds, He spake to men and women one by one. He was on the mountain, and by the sea; He was in the desert, and by the river; He was both in house and in temple; He was everywhere accessible; in the fullest sense “once in the end of the world hath He appeared.” Oh, the glory of this gracious epiphany! This is the greatest event in history: the invisible God has appeared in human form. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2194.cfm