The first and last stanzas of this song tell it all. They say, "Blessed is he whose transgression is forgiven, whose sin is covered. Blessed is the man to whom the Lord does not impute iniquity, and in whose spirit there is no deceit . . .Many sorrows shall be to the wicked; but he who trusts in the Lord, mercy shall surround him. Be glad in the Lord and rejoice, you righteous; and shout for joy, all you upright in heart!"
The song is intended to bring each worshiper to trust the Lord enough to confess every sin to Him. There are adequate reasons given for doing so. David sings, and the people repeat the first of these reasons when they say, "When I kept silent, my bones grew old . . ." It's a negative reason - avoiding confession results in physical symptoms of depression and no peace with God.
Then, as the second reason, David sings, "I said, 'I will confess my transgressions to the Lord,' and You forgave the iniquity of my sin." Simply put, confession is the way to God's forgiveness. God doesn't say, "If you have sinned I'll automatically forgive your sin and cleanse you from all transgression." He says you have to CONFESS!
The third reason should cause the worshiper to rejoice, because, through confession, God becomes his "hiding place," preserves him from trouble, and surrounds him with songs of deliverance!
God Himself speaks the fourth reason. He says, "I will instruct you and teach you in the way you should go; I will guide you with My eye." If the worshiper confesses and is forgiven, then God will teach him and guide him.
Finally, the rest of the admonition can be summed up simply by saying, "Don't stubbornly refuse to confess your sins to God!"
Are these enough reasons for you? Do you sometimes feel depressed? Is there guilt in your soul, so that you need to "get it off your chest?" Do you want to overflow with songs of deliverance and be kept from trouble? Do you want your life to be guided by the Lord?
If these are enough reasons, then daily, hourly, CONFESS your most hidden, your innermost, your most habitual sins! "He is faithful and just to forgive your sins and to cleanse you from all unrighteousness!" TODAY!