Synopsis of the Books of the Bible, by John Nelson Darby, [1857-62], at sacred-texts.com
Psalms Chapter 20
In Psalm 20 we have, in the midst of sorrows and evil come in as regards the two preceding testimonies, the faithful witness, the living witness Himself. He is seen in the day of His distress, for He is come down into the midst of an ungodly people. The remnant is prophetically designated by the fact that they in heart enter into His distress, assured that Jehovah will hear His Anointed.
Conscience then characterizes the remnant, truth in the inward parts in presence of the law, and taking that law spiritually; interest of heart in Messiah, when He is the despised and rejected of men. Still we are in Israel, and the help is sought from the God of Israel, and still as dwelling amongst them, having His sanctuary there.
In Psalm 16 the Lord identified Himself with the remnant. Here they associate themselves in heart with Him thus suffering, and in His conflict here, though they may see as but the outside of it, yet be assured of His acceptance with Jehovah. They look for His offerings to be accepted, the desire of His heart and His counsels to be fulfilled, all His petitions accomplished. Their joy is in the full deliverance of this blessed but dependent One. In Verse 6 (Psa 20:6) we have the assurance of faith as to it, that from heaven itself Jehovah has heard, the mighty are fallen, the poor of the flock are raised up and maintained before Him.
In Verse 9 (Psa 20:9) Messiah takes another place. While Jehovah had delivered Him as the dependent One in the day of His distress, the remnant now look to His hearing them when they call. Jehovah is still looked to as the Savior, but Messiah the king is invoked. They now know that the Anointed is exalted. No part of scripture opens out the Person of Christ as the Psalms do, unless the first two chapters of Hebrews, which quote and serve as a key to them: here Messiah connected with the remnant in the dependent One, but exalted too as the king to be invoked of Israel. A little farther on we shall find that He is Jehovah Himself. I see no reason to alter the text according to the Septuagint, followed by others, such as the Latin. The Targum, and Syriac, and all Jewish interpretations, read as it is read in English. The other reading is, "Jehovah save the king hear us," etc. Already in Psalm 21 Jehovah and the king are associated in judgment, as indeed we have seen they were already in Psalm 2. It is the very main point of instruction in the Psalms the mystery of the manifestation of Christ in flesh.