To Joseph, the angel says "And she will bring forth a Son, and you shall call His name Jesus, for He will save His people from their sins." (Matt 1v21)
That is a truly amazing verse. It shows us the purpose of Jesus' coming. While He did many things - He revealed God, He was an example, He taught, He went around doing good, He trained His disciples - His purpose was to save us. He came to die to be our deliverer from sin.
To Mary, the angel says something very different "And behold, you will conceive in your womb and bring forth a Son, and shall call His name Jesus. He will be great, and will be called the Son of the Highest; and the Lord God will give Him the throne of His father David. And He will reign over the house of Jacob forever, and of His kingdom there will be no end." (Luke 1v31-33)
He came to die, but ultimately He came to reign! He died in order to reign (Rom 14v9). We must never cease to thank Him for the cross, but we must also never forget the purpose of the cross - to establish a kingdom that will have no end. That kingdom will extend from shore to shore. From the rising of the sun to its going down, the Lord's name will be praised.
For more about Christ's ultimate triumph, there is some excellent reading to be found at Life on Wings. Dan's latest post, Finale to the "Ultimate Triumph" Series, contains links to three outstanding sermons by Dr Ern Baxter. I hope to have more to share about these soon, but for now read and receive.
Jesus came to reign! Hallelujah!