Psalm 21 is the celebration of the accomplished victory prayed for in Ps 20. The kind of language used means it's a Messianic Psalm, for only Christ can fully fulfil these words, although it was fulfilled in measure by David. The ancient Rabbis interpreted it as speaking of King Messiah (v1), but the later Rabbis dropped this view, to try & prevent Christians from showing how Jesus perfectly fulfils it. v1: “The KING (Messiah) shall have joy in Your strength (invisible power), O LORD; and in Your salvation (manifested victory) how greatly shall he rejoice!” This describes God's mighty power that raised Christ from the dead, bringing Him into manifested victory & glory. Likewise, we should thank God for the invisible power of His Spirit (the blessing), as well as the manifested blessings brought forth by His grace. This verse is the answer to the prayers in Ps 20:2,5,8. v2: “You have given him his heart’s desire, and have not withheld the request (desire) of his lips. Selah.” This corresponds to Ps 20:4. His desire is our salvation, through His victory over enemy powers (Heb 12:2). Note the poetic parallelism – He did not just desire our salvation & victory, but prays for us (Jas 4:2, Heb 7:25). You were on His mind when He went to the Cross and ever since! Also notice God works through our desires, but only when our heart is submitted to God (Ps 37:4, Phil 2:12-13). v3: “For You meet (welcome) him with the blessings of goodness (abundant rich blessings); You set a crown of pure gold on his head.” Here the image changes from celebrating a Conquest to a Coronation - both were fulfilled by Christ in His Ascension. Having won His great victory, He ascended to Heaven and was crowned as Lord of all. Also as our representative He received every blessing of the New Covenant on our behalf, so that every blessing is now ours in Christ (Eph 1:3), for we are joints heirs with Him (Rom 8:17). This blessing includes abundant & eternal life, salvation, glory, authority (v4-5). The fact He shares this blessing with us is stated in v6a: “For You have made him most blessed forever (literally, ‘you have made Him blessings forever’).” This means He was made to the source of blessing to us forever (blessed to be a blessing). This blessing includes joy, which only comes from God's Presence: “You have made him exceedingly glad (‘joyful with gladness’) with Your Presence” (see Ps 16:11). God’s Presence is the key to happiness. Thus, holiness comes before happiness (Heb 1:9, Ps 45:7). The basis for Christ (and us) to receive God’s blessing is faith in the Lord and His covenant love: “For the KING trusts in the Lord, and through the mercy (covenant love and faithfulness) of the Most High, he shall not be moved (shaken)” (v7). He shall be established forever in God’s grace. Whereas Part 1 looks back Christ’s decisive victory at His 1st Coming (v1-7), Part 2 looks forward to His future victory at His 2nd Coming, when He'll judge all His enemies and establish His Kingdom on earth (v8-13). Thus, after Christ's initial victory, this predicts His enemies will still be in the field, which is the case. But at His 2nd Coming He will search out and then seize all His enemies with His mighty right hand (v8, Ex 15:6). He'll then throw them into His fiery furnace: “You (the KING) shall make them as a fiery oven in the time of Your anger (lit: ‘face, presence’), the LORD shall swallow them up in His wrath, and the fire shall devour them” (v9). This will happen when they meet Him face to face for judgment. The parallelism shows the close relationship between KING (Messiah) and the LORD. Christ is the Lord’s representative & channel of both the Lord’s salvation for His people (v6) and His wrath on His enemies (v9). This judgment is in 2 stages: (1) At the 2nd Coming (or death) the souls of the wicked are thrown into the fire of Hades, and then at the end of time, they'll be resurrected and stand before the Gr