This psalm appears to have been written during the time 1 Chronicles was written. It is from the perspective of someone in exile desiring to return to Zion (Jerusalem). Some have seen this as a look at the remnant of Israel during the Tribulation Period found in Revelation with the antichrist deceiving them (MacDonald, W., & Farstad, A. 1997).
The Septuagint combines this psalm with Psalm 42. The refrain of verses gives credibility for this.
Verses 1-2-The Psalmist begins his plea to God for help with terms used in court. He asks God to contend or argue his case and to defend him before the court. He pleads for God to do what God does, be just, be true, and bring salvation. The Psalmist realizes that there is no hope outside of God and that in God is deliverance.
Verses 3-4-The Psalmist brings out the truth that is missing those in from verses one and two. He is light not darkness or oppression, He is truth not deceit, He leads to life not destruction. The Psalmist proclaims his intent based on the activity of God in his life. The natural progression of faith is culminated in worship of God whether in music, words, life, voice, or whatever you have that can proclaim His worth (1 Corinthians 10.31).
Verse 5-This Psalm ends where the previous Psalm ends (Psalm 42.5, 11). When our hope is placed in God alone, we have no need for depression, darkness, doom, or deception. When our hope is in Him, we have praise, light, life, and truth. If you noticed, the Psalmist asked three times “Why are you down?” (once in Psalm 42 and twice in Psalm 43). He answers with hope. It is the assurance that God is in control of all things that lead us out of darkness and into light.
When God acts for us, do we communicate who He is and what He has done for us to those in our area of influence? Are we so committed to Him that we broadcast His glories to those around us? We see in this Psalm that the personal worship must become corporate or else there is still despair. Are you living your life in front of others in such a way that they see your worship of God and you see their worship of God (living life for Him)?