Psalm 4
For the End; in psalms: an ode by David.

You heard me when I called, O God of my righteousness.
You strengthened my heart when I was in distress;
Have mercy on me, and hear my prayer.
How long, O you sons of men,
Will you be slow of heart?
Why do you love vain things
And seek after lies?
Know that the Lord made His Holy One wondrous;
The Lord will hear me when I cry to Him.
Be angry, and do not sin;
Hav remorse upon your beds
For what you say in your hearts.
(Pause)

Offer the sacrifice of righteousness,
And hope in the Lord.
There are many who say, “Who will
Show us good things?”
O Lord, the light of Your face was
Stamped upon us.
You put gladness in my heart:
From their season of wheat, wine, and oil they were multiplied.
I will both sleep and rest in peace,
For You alone, O Lord, cause me to dwell in hope.

Commentary from the Orthodox Study Bible

Ps 4 emphasized the End (vv. 1, 2). Christ “is the end of the law for righteousness to everyone who believes” (Rom:4), and He is “the Alpha and the Omega, the Beginning and the End” (Rev 1:8) He exhourts people not to be slow of heart, and not to love vain things, nor to seek after lies (v. 3). Rather, they should realize that the Lord, who is the Father, has made His Holy One, who is Christ, to be wondrous (v. 4) in His death and Resurrection (v. 9).
The Church in her prayers uses Ps 4 as a prekeimenon at Vespers on Mondays. It is also one of the psalms for Great Compline during Great Lent.

Thoughts

Strengthen our hearts, Lord. Have mercy on us.
Here, David is dealing with a rebellion coming from his own son Absalom and his lies.
But David says the Lord will hear him when he cries out to Him. He tells us to be angry but do not sin.
We can rest, we can relax, because God gives us hope.

I met a family at Back to School night who fled from another continent and then moved again from Canada to here. The mom said, “We do not give up.” Life has not been easy for them, but she is so full of hope and determination. At a local restaurant, I talked to a woman who said she was a refuge. She made it here despite persecution. I told her I am glad she is here.

David, the family at back to school night, the people all around us who are persevering despite what looks grim circumstances. Strengthen our hearts Lord. Please continue to have mercy on us, Lord. Thank you for your love for us.