Charles H. Spurgeon on Psalms 119:142

Thy righteousness is an everlasting righteousness. Not only righteous at the first giving out, but righteous in all ages and times; and should we slight this rule that will hold for ever? In the world, new lords, new laws; men vary and change their designs and purposes; privileges granted today may be repealed tomorrow; but this wold will hold true for ever. Our justification by Christ is irrevocable; that part of righteousness is everlasting. Be sure you are justified now upon terms of the gospel, and you shall be justified for ever: your forgiveness is an everlasting forgiveness, and your peace is an everlasting peace: "I will remember their sin no more": Jeremiah 31:34. So the other righteousness of sanctification, it is for ever; approve yourselves to God now, and you will approve yourselves at the day of judgment. Thomas Manton.