Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the LORD, and he will have mercy upon him; and to our God, for he will abundantly pardon.
Let the wicked forsake his way, and the unrighteous man his thoughts. "Unrighteous man" - Hebrew, 'iysh (H376) 'aawen (H205), man of iniquity: true of all men. The "wicked" sins, more openly in "his way:" the "unrighteous" refers to the more subtle workings of sin in the "thoughts." All are guilty in the latter respect, though many fancy themselves safe, because not openly 'wicked in ways' (Psalms 94:11, "The Lord knoweth the thoughts of man, that they are vanity").
And let him return unto the Lord, and he will have mercy upon him; and to our God, for he will abundantly pardon. The parallelism is that of gradation. The progress of the penitent is to be from negative reformation, 'forsaking his
(1) way,' and
(2) a further step, "his thoughts," to positive repentance,
(a) 'returning to the Lord' (the only true repentance, Zechariah 12:10),
(b) and making God his God, along with the other children of God (the crowning point; appropriation of God to ourselves, in communion with the saints: "to our God").
"Return" implies that man originally walked with God, but has apostatized. Isaiah saith, "our God" - the God of the believing Israelites. Those redeemed themselves desire others to come to their God (Psalms 34:8; Revelation 22:17).
For he will abundantly pardon ( yarbeh (H7235) liclowach (H5545)) - literally, multiply to pardon; still more than "have mercy." God's graciousness is felt more and more the longer one knows Him (Psalms 130:7).