promised

And when the time came for their purification according to the Law of Moses, they brought him up to Jerusalem to present him to the Lord (as it is written in the Law of the Lord, ” Every male who first opens the womb shall be called holy to the Lord”) and to offer a sacrifice according to what is said in the Law of the Lord, “a pair of turtledoves, or two young pigeons.” Now there was a man in Jerusalem, whose name was Simeon, and this man was righteous and devout, waiting for the consolation of Israel, and the Holy Spirit was upon him. And it had been revealed to him by the Holy Spirit that he would not see death before he had seen the Lord ‘s Christ. And he came in the Spirit into the temple, and when the parents brought in the child Jesus, to do for him according to the custom of the Law, he took him up in his arms and blessed God and said, “Lord, now you are letting your servant depart in peace,
according to your word; for my eyes have seen your salvation that you have prepared in the presence of all peoples, a light for revelation to the Gentiles, and for glory to your people Israel.” And his father and his mother marveled at what was said about him. And Simeon blessed them and said to Mary his mother, ” Behold, this child is appointed for the fall and rising of many in Israel, and for a sign that is opposed (and a sword will pierce through your own soul also), so that thoughts from many hearts may be revealed.” And there was a prophetess, Anna, the daughter of Phanuel, of the tribe of Asher. She was advanced in years, having lived with her husband seven years from when she was a virgin, and then as a widow until she was eighty- four. She did not depart from the temple, worshiping with fasting and prayer night and day. And coming up at that very hour she began to give thanks to God and to speak of him to all who were waiting for the redemption of Jerusalem. And when they had performed everything according to the Law of the Lord, they returned into Galilee, to their own town of Nazareth. And the child grew and became strong, filled with wisdom. And the favor of God was upon him (Luke 2:22-40, ESV)

Before Simeon would see death he would see the Christ!

And he believed this. The Holy Spirit had revealed this to him and Simeon held to the promise he had from God.

And when Simeon beheld Jesus, he knew the promise had been fulfilled! He had seen the Christ, the one who would bring consolation to Israel, and he told Mary that she would have her own soul pierced by a sword, because of all that would happen to this child.

God is good on His promises, and to that we can hold true!