Psalms 94:15

But judgment shall return unto righteousness - If we read יושב yosheb, shalt sit, for ישוב yashub, shall return, which is only placing the ו vau before the ש shin instead of after it, we have the following sense: Until the just one shall sit in judgment, and after him all the upright in heart. Cyrus has the epithet צדק tsedek, the just one, in different places in the Prophet Isaiah. See Isaiah 41:2, Isaiah 41:10; Isaiah 45:8; Isaiah 51:5. It was Cyrus who gave liberty to the Jews, who appeared as their deliverer and conductor to their own land, and they are all represented as following in his train.

But judgment shall return unto righteousness - That is, The exercise of judgment shall be so manifest to the world - as if it "returned" to it - as to show that there is a righteous God. The truth here taught is, that the "results" of God's interposition in human affairs will be such as to show that he is on the side of righteousness, or such as to vindicate and maintain the cause of righteousness in the earth.

And all the upright in heart shall follow it - Margin, shall be after it. The meaning is, that all who are upright in heart - all who are truly righteous - will follow on in the path of justice; that they will regard what God does as right, and will walk in that path. The fact that what occurs is done by God, will be to them a sufficient revelation of what ought to be done; and they will follow out the teachings properly suggested by the divine dealings as their rules of life. In other words, the manifested laws of the divine administration will be to them an indication of what is right; and they will embrace and follow the lessons thus made known to them by the dealings of Divine Providence as the rules of their own conduct.

94:15 But - God will declare himself to be a righteous judge, and will again establish justice in the earth. Follow - They will all approve of it, and imitate this justice of God in all their actions.