The people are exhorted to return to the Lord, ask Him to take away their iniquity, to receive them and in return they will offer the sacrifices of their lips such as praise, thanksgiving and confession. They will acknowledge and confess that no nation can save them and that no longer will they say that their idols, the works of their hands, are their gods.
They will acknowledge and confess that the Lord is their God and that only He could save them. And in response to this, God will heal their backsliding and love them freely. He will turn His anger away. They will no longer have anything to do with idols.
Verse 8: I am like a green cypress tree; Your fruit is found in Me is similar to what Jesus said in John 15:4: Abide in Me, and I in you. As the branch cannot bear fruit of itself, unless it abides in the vine, neither can you, unless you abide in Me. Our fruit is found in God. Unless we abide in Him and He in us, we can do nothing and any effort to do our own will, not seeking Him, trusting in ourselves or in others, our efforts will be in vain and fruitless.
God is the only One who can restore us when we go astray. Nothing or no one can save us. Only in God, can we find mercy and deliverance.