John Calvin Commentary Psalms 38:3

"There is no soundness in my flesh because of thine indignation; Neither is there any health in my bones because of my sin." — Psalms 38:3 (ASV)

There is no soundness in my flesh because of your anger. Others translate this as, There is no beauty; but this does not seem as suitable.

In the following clause, David ascribes to God the praise of righteousness. Without this, the acknowledgment he previously made would be of little use; indeed, instead of this, such an acknowledgment sometimes rather exasperates people's minds, so that they provoke God's wrath still more by accusing Him of cruelty and pouring forth horrible blasphemies against Him.

Therefore, nothing can be more preposterous than to imagine that there is in God a power so supreme and absolute (as it is called) as to deprive Him of His righteousness.

As soon as David recognized his affliction as coming from God, he turned to his own sin as the cause of the Divine displeasure. For he was already fully convinced in his own mind that God is not like a tyrant who exercises cruelty needlessly and randomly, but a righteous judge who never shows His displeasure by inflicting judgments unless He is grievously offended.

If, then, we would give God the praise that is due to Him, let us learn from David's example to connect our sins with His wrath.