John Gill's Exposition of the Whole Bible
Isaiah 56:1
Thus saith the Lord, keep ye judgment, and do justice,.... Observe the word of the Lord, which comes from the God of judgment, is the best informer of the judgment, and the only rule of faith and practice; and which should be kept in the heart, mind, and memory, be held fast, and abode by; and so likewise all the ordinances of the Lord, which are his statutes and judgments; these should be all of them kept as they were delivered, in faith, from love, and with a view to the glory of God and Christ; all matters of judgment and justice between man and man, whether public or private, should be observed and done; all that you would have men to do to you, do to them; all works of righteousness required by the Lord, though not to be depended upon for justification in his sight, but regarded as fruits and evidences of faith and repentance; for works of righteousness cannot be done but by regenerated persons. The reasons enforcing a regard to these things follow:
for my salvation is near to come; which are either the words of God the Father concerning Christ and his salvation, whom he appointed, called, and sent to effect it; who, when this prophecy was given out, was to come, and was to come as a Saviour, and was near at hand; and whose salvation, as to the efficacy of it, was come, all the Old Testament saints being saved by it; and, as to the impetration of it, was near at hand, he being ready to come, and in a short time, comparatively speaking, did come, and work out this salvation God had resolved upon, chosen his people to, and in which his glory was greatly concerned; and therefore calls it his own: or they are the words of Christ, who is the sole author of spiritual and eternal salvation, and in whom alone it is, and from him alone to be had; and which was near, being performed by himself, published in his Gospel, applied by his Spirit, and enjoyed by his people here and to all eternity:
and my righteousness to be revealed; and which also are either the words of God the Father concerning his faithfulness in the performance of his promise of Christ, and good things by him; concerning his justice, which was glorified in the work of redemption by Christ; or concerning the righteousness of Christ, called his, because he sent him to bring it in, he approves of it, imputes it to his people, and justifies them by it; or they are the words of Christ concerning his own righteousness, which he has wrought out, and brought in, in the room and stead of his people, and for their sakes; and which is revealed, not by the light of nature, nor by the law of Moses, but by the Gospel of Christ, and that from faith to faith, or only to believers. Now these being used as arguments to engage to the keeping and doing judgment and justice, show that the doctrines of salvation by Christ, and justification by his righteousness, are no licentious doctrines.