Hebrews 4:1

Here, I. The apostle declares that our privileges by Christ under the gospel are not only as great, but greater than those enjoyed under the Mosaic law. He specifies this, that we have a promise left us of entering into his rest; that is, of entering into a covenant-relation to Christ, and a state of communion with God through Christ, and of growing up therein, till we are made perfect in glory. We have discoveries of this rest, and proposals, and the best directions how we may attain unto it. This promise of spiritual rest is a promise left us by the Lord Jesus Christ in his last will and testament, as a precious legacy. Our business is to see to it that we be the legatees, that we lay our claim to that rest and freedom from the dominion of sin, Satan, and the flesh, by which the souls of men are kept in servitude and deprived of the true rest of the soul, and may be also set free from the yoke of the law and all the toilsome ceremonies and services of it, and may enjoy peace with God in his ordinances and providences, and in our own consciences, and so have the prospect and earnest of perfect and everlasting rest in heaven. II. He demonstrates the truth of his assertion, that we have as great advantages as they.

— Matthew Henry's Concise Commentary (public domain)