Suffering is not really a result of sin. Suffering is a result of some kind of pain. It could be physical or emotional pain. If we attribute suffering to sin then we are saying that change comes from some kind of force of the will. It is important for us to explain a problem with the right terms in order to get to the causes. The more detailed we are as we observe the problem the more we are aware of the ways to be healed. We must make a distinction between sin and the curse.

This is what we are taught in the Psalms. The Psalms teach us about the presence of sin. But there is a much deeper problem than the presence of sin. If sin is the cause of pain then we could end the pain through an act of the will. Sin is not the cause of pain but its the reason there is corruption in this world. This is why we are taught that all the corruption that exist in this world was put into existence because of the sin of Adam. What happened as a result of the first sin? Sin brought death. So the problem with pain is not the presence of sin but the consequences of sin which is death.
This is why the Psalms teach that the opposition to the elect must be narrowed down beyond the presence of sin to the consequences of sin which is corruption. This is why we are taught that our sin has been taken care of by God. The presence of corruption results in pain. Pain is the communication of the opposition. When we experience pain we experience some form of death. We experience the weight of the opposition to blessing.This weight is what we describe as the curse.
We are taught that our experience with the opposition is the logical description of our image. So we could say that sin, righteousness, corruption , cursing and blessing is part of the communication that we hear as our experience of sorrow or joy. If we describe our experience without a logical explanation of the causes then we are just adding to the weight of the pain. This is why the Psalms teach that God no longer keeps a record of our sin. We are always tempted to apply the wrong remedy. The presence of sin is not necessary the most dangerous opposition. Because God allowed sin to continue and the bible says that God controls each sin we commit. God could have made the consequences of sin instant death. But the presence of sin is part of His activity in redeeming His elect. In this sense God took away the power of the law by eliminating the reasons that the present sin could cause us to escape His control. God forgets our sin. If sin is not Gods main enemy then what is it? And we must explore the power and the communication of the curse.