I take them all of speaking about Christ, and encouraging him toward the cross:
Psalm 43 was written to encourage Jesus through his trials prior to the cross. In his duel nature, Jesus had two temptations that followed him through his ministry.
Why as a man who had not sinned, must he endure judgement. And as God, why couldn't he grasp his divinity and use his omniscience, omnipresence, omnipotence, etc, to avoid the cross.
Hear the words as if spoken by Jesus.
Ps 43:1 ¶ Judge me, O God, and plead my cause against an ungodly nation: O deliver me from the deceitful and unjust man.
There is much discussion and debate as to why we can't count his three days and nights in the grave. It is an invented problem. He did not prophesy that he would be three days and nights in the grave, but in the 'heart of the earth'. The verse above helps tie the loose ends of the prophecy when considered with this:
'Jer 17:9 The heart [is] deceitful above all [things], and desperately wicked: who can know it?
Jesus was in the deceit and wickedness of the earth for three days and three nights. Count back from his resurrection and you land on the day that Judas made a contract to betray Jesus.
Verse 1 is parallel to Jesus crying out at Gethsemane for the cup to be removed.
Ps 43:2 For thou [art] the God of my strength: why dost thou cast me off? why go I mourning because of the oppression of the enemy?
Do you hear the parallel of Mt 27:46?
Ps 43:3 O send out thy light and thy truth: let them lead me; let them bring me unto thy holy hill, and to thy tabernacles.
Paraphrase: Send your holiness and truth: let them lead me to the cross (where men meet God) and to your people.
We are the temple of God, and in this case it is plural.
Jesus is resolving in his heart to face the cross: "Nevertheless, your will be done."
Ps 43:4 Then will I go unto the altar of God, unto God my exceeding joy: yea, upon the harp will I praise thee, O God my God.
Paraphrase: I will be the burnt offering to the God of my joy. ....
The word harp has hidden within it the meaning 'post of clear revelation' and 'Son of God's Lamp/flame'.
Paraphrases:
1. In the cross of revelation (when the invisible God is made known by reconciling holiness and grace) I will praise you...
2. In the Son of God's lamp/flame I will praise you...
Ps 43:5 Why art thou cast down, O my soul? and why art thou disquieted within me? hope in God: for I shall yet praise him, [who is] the health of my countenance, and my God.
Jesus has resolved to face the cross and will again praise God trusting God to strengthen his countenance.
