Then took he Him up in his arms, and blessed God, and said, Lord, now lettest Thou Thy servant depart in peace…For mine eyes have seen Thy salvation… – Luke 2:28-30

Saints are willing to depart when their work is almost done. This will not be the case with many here present, perhaps, but it was so with Simeon. Good old man! He had been very constant in his devotions, but on this occasion, he came into the temple, and there, it is said, he took the child in his arms and blessed God. Once more he delivered his soul of its adoration-once more he blended his praise with the songs of angels. When he had done that, he openly confessed his faith: another important work of every believer-for he said, “Mine eyes have seen Thy salvation.” He bore public testimony to the child Jesus and declared that He should be “a light to lighten the Gentiles.” Having done that, he bestowed his fatherly benediction upon the child’s parents, Joseph and His mother; he blessed them, and said unto Mary “Behold, this child is set for the fall and rising again of many in Israel.” Now, we read that David, after he had served his generation, fell on sleep; it is time for man to sleep when his life’s work is finished. Simeon felt he had done all: he had blessed God; he had declared his faith; he had borne testimony to Christ; he had bestowed his benediction upon godly people; and so, he said, “Now, Lord, lettest Thou Thy servant depart in peace.” …When a man feels, without claiming any merit, that he has fought a good fight, finished his course, and kept the faith, then will he rejoice in the crown which is laid up for him in heaven, and he will long to wear it. Throw your strength into the Lord’s work, dear brethren-all your strength; spare none of your powers: let body, soul, and spirit be entirely consecrated to God, and used at their utmost stretch. Get through your day’s work, for the sooner you complete it, and have fulfilled like an hireling your day, the more near and sweet shall be the time when the shadows lengthen, and God shall say to you, as a faithful servant, “Depart in peace!” ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1014.cfm