Ps 4 4 In your anger do not sin;
when you are on your beds,
search your hearts and be silent.
Selah
5 Offer right sacrifices
and trust in the LORD .

The Psalmist is teaching that we can approach God when we are angry. The question is it good for Gods elect to have a general attitude of anger as a result of being miss treated in the world? Should we be more concerned for examining our sin or see the importance of dealing with our anger on a daily basis?

The Psalmist starts the Psalms teaching us the entire world is in darkness and Gods word is the only means to light our way. In Psalm 2 , he teaches that Gods judgements are not delayed. God is absolutely just at all times. His blessing and curses cannot be thwarted. Gods line of justice is always the same. Psalm 3 he teaches us that we will face an insurmountable army as we live from day to day. He is teaching that we should not be surprise when we look at the circumstances in our lives and feel like we are facing an opposition as if we were ready for war and the opposition we face made us fear for our lives. Then here in Psalm 4 he is teaching us that we live in a world in which men scheme against Gods creative order. We are always facing the miss representation of our plans to do good. We are always being forced in an evil prophecy about us and about our purposes. It is interesting that the Psalmist teaches us how to deal with our anger before Psalm 5 in how to deal with our guilt.

So we see in the opening of the Psalms he is showing that we must approach God throughout every day in order to deal with personal attitudes. We cannot allow these attitudes of sloth, lack of faith, having no hope, being hardened by anger and guilt to flourish from one day to the next . We must apply these Psalms so that we will not allow ourselves to be hardened. In this Psalm he is teaching us the importance of knowing the evil scheme that we are always facing and rolling over to God.

In Psalm 2 we are taught that the world is controlled by Gods kingdom principles. Man cannot opposes the kingdom of God because God judges all things in life and death judgements. In this Psalm God is the Elohim...creates the re ordering of all things and has revealed them in Christ. When we are saved we are set apart from the world by grace. In Psalm 3 he describes our opposition in the world, but in 4 he is describing our inward opposition. He is saying that all communication is a war between a world where man returns to his original purpose of enjoying the gifts of God. God is reordering our view by teaching us the prophecy of blessing. But wicked men devise schemes that oppose our view of a good God. He is teaching us that we must discern the schemes and we must be aware of our reaction of anger in facing the opposition. We must deal with our anger before it hardens us.

We approach God with the law, covenants, curses, etc on our lips. Offer right sacrifices and trust in the Lord. Here trusting is "confiding in" so as to be secure. Gods word is the basis of our trust as we speak the gifts. When the Psalmist offers a sacrifice he is approaching God according to his present disposition . The Psalmist sacrifices with a overflowing joy, and enlarged view of God, a confession in a covenant, when he is in danger, and in this Psalm he is dealing with anger. This is a picture of substitution by death. It pleased God to punish Christ who destroyed all corrupt opposition. The substitutionary work of Christ is that by which we can role all our troubles both inward and outward over to God.