esus has many titles, holds many offices and has acted in many distinct ways. He is our Savior. He is the King of Kings. And, He is both a conqueror and a judge over His enemies. These things and more are alluded to in Psalm 21.
Concerning the Christ; verse 4 hints of His resurrection. Verses 5 & 6 point to His exaltation; verse 7 to His humiliation. Verse 8 reminds us of His coming advent. Verses 9-12 give us a peek into the day of the judgment of His enemies. And, verse 13 helps us to see Him in His kingdom.
Oh surely, the Psalm was originally written with king David as it's object, but just like many other prophecies in the Scripture, it's full clarity isn't really seen until it is applied appropriately to its ultimate object - the Son of God And, don't try to tell me that applying Psalm 21 to the Messiah is a stretch. I stand firmly on Romans 11:36, "For of Him, and through Him, and to Him, are all things: to whom be glory forever. Amen." Sometimes we look around and see the devil behind every bush. Perhaps if we would look more closely at things in this life and if we would observe with faith-filled spiritual eyes, we would see our Lord in every situation instead of just noticing the devil (Philippians 4:8 & Romans 8:28). Look for Him in every verse and in every line of Scripture (Jeremiah 29:13). And, while you're at it, look for Him in the sky too (Titus 2:13).