Hebrews 4:10

10.For he that is entered into his rest, or, For he who has rested, etc. This is a definition of that perpetual Sabbath in which there is the highest felicity, when there will be a likeness between men and God, to whom they will be united. For whatever the philosophers may have ever said of the chief good, it was nothing but cold and vain, for they confined man to himself, while it is necessary for us to go out of ourselves to find happiness. The chief good of man is nothing else but union with God; this is attained when we are formed according to him as our exemplar.

Now this conformation the Apostle teaches us takes place when we rest from our works. It hence at length follows, that man becomes happy by self­denial. For what else is to cease from our works, but to mortify our flesh, when a man renounces himself that he may live to God? For here we must always begin, when we speak of a godly and holy life, that man being in a manner dead to himself, should allow God to live in him, that he should abstain from his own works, so as to give place to God to work. We must indeed confess, that then only is our life rightly formed when it becomes subject to God. But through inbred corruption this is never the case, until we rest from our own works; nay, such is the opposition between God’s government and our corrupt affections, that he cannot work in us until we rest. But though the completion of this rest cannot be attained in this life, yet we ought ever to strive for it. (70) Thus believers enter it but on this condition, — that by running they may continually go forward.

But I doubt not but that the Apostle designedly alluded to the Sabbath in order to reclaim the Jews from its external observances; for in no other way could its abrogation be understood, except by the knowledge of its spiritual design. He then treats of two things together; for by extolling the excellency of grace, he stimulates us to receive it by faith, and in the meantime he shows us in passing what is the true design of the Sabbath, lest the Jews should be foolishly attached to the outward rite. Of its abrogation indeed he does expressly speak, for this is not his subject, but by teaching them that the rite had a reference to something else, he gradually withdraws them from their superstitious notions. For he who understands that the main object of the precept was not external rest or earthly worship, immediately perceives, by looking on Christ, that the external rite was abolished by his coming; for when the body appears, the shadows immediately vanish away. Then our first business always is, to teach that Christ is the end of the Law.