Who hath also sealed us - The word used here (from σφραγίζω sphragizō) means to seal up; to close and make fast with a seal, or signet; as, e. g., books, letters, etc. that they may not be read. It is also used in the sense of setting a mark on anything, or a seal, to denote that it is genuine, authentic, confirmed, or approved, as when a deed, compact, or agreement is sealed. it is thus made sure; and is confirmed or established. Hence, it is applied to persons, as denoting that they are approved, as in Revelation 7:3; "Hurt not the earth, neither the sea, nor the trees, until we have sealed the servants of our God in their foreheads;" compare Ezekiel 9:4; see the note, John 6:27, were it is said of the Saviour, "for him hath God the Father sealed;" compare John 3:33. In a similar manner Christians are said to be sealed; to be sealed by the Holy Spirit Ephesians 1:13; Ephesians 4:30; that is, the Holy Spirit is given to them to confirm them as belonging to God. He grants them His Spirit. He renews and sanctifies them. He produces in their hearts those feelings, hopes, and desires which are an evidence that they are approved by God; that they are regarded as his adopted children; that their hope is genuine, and that their redemption and salvation are sure - in the same way as a seal makes a will or an agreement sure. God grants to them His Holy Spirit as the certain pledge that they are His, and shall be approved and saved in the last day. In this there is nothing miraculous, or in the nature of direct revelation. It consists of the ordinary operations of the Spirit on the heart, producing repentance, faith, hope, joy, conformity to God, the love of prayer and praise, and the Christian virtues generally; and these things are the evidences that the Holy Spirit has renewed the heart, and that the Christian is sealed for the day of redemption.
And given the earnest of the Spirit - The word used here (ἀῤῥαβών arrabōn from the Hebrew צרבון ‛arabown means properly a pledge given to ratify a contract; a part of the price, or purchase money; a first payment; that which confirms the bargain, and which is regarded as a pledge that all the price will be paid. The word occurs in the Septuagint and Hebrew, in Genesis 38:17-18; Genesis 38:20. In the New Testament it occurs only in this place, and in 2-Corinthians 5:5, and Ephesians 1:14, in each place in the same connection as applied to the Holy Spirit, and his influences on the heart. It refers to those influences as a pledge of the future glories which await Christians in heaven. In regard to the "earnest," or the part of a price which was paid in a contract, it may be remarked:
(1) That it was of the same nature as the full price, being regarded as a part of it;
(2) It was regarded as a pledge or assurance that the full price would be paid. So the "earnest of the Spirit," denotes that God gives to his people the influences of his Spirit: his operation on the heart as a part or pledge that all the blessings of the covenant of redemption shall be given to them.
And it implies:
(1) That the comforts of the Christian here are of the same nature as they will be in heaven. Heaven will consist of like comforts; of love, and peace, and joy, and purity begun here, and simply expanded there to complete and eternal perfection. The joys of heaven differ only in degree, not in kind, from those of the Christian on earth. That which is begun here is perfected there; and the feelings and views which the Christian has here, if expanded and carried out, would constitute heaven.
(2) these comforts, these influences of the Spirit, are a pledge of heaven. They are the security which God gives us that we shall be saved. If we are brought under the renewing influences of the Spirit here; if we are made meek, and humble, and prayerful by his agency; if we are made to partake of the joys which result from pardoned sin; if we are filled with the hope of heaven, it is all produced by the Holy Spirit, and is a pledge, or earnest of our future inheritance; as the first sheaves of a harvest are a pledge of a harvest; or the first payment under a contract a pledge that all will be payed. God thus gives to his people the assurance that they shall be saved; and by this "pledge" makes their title to eternal life sure.

Who hath also sealed us - Not only deeply impressed His truth and image upon our hearts; but, by the miraculous gifts of the Holy Spirit, attested the truth of our extraordinary unction or calling to the ministry.
And given the earnest of the Spirit - Τον αρραβωνα του Πνευματος. From this unction and sealing we have a clear testimony in our souls, the Divine Spirit dwelling constantly in us, of our acceptance with God, and that our ways please him. The αρῥαβων of the apostle is the same as the ערבן erabon of Moses, Genesis 38:17, Genesis 38:18, Genesis 38:20, which we there translate pledge. The word properly signifies an earnest of something promised; a part of the price agreed for between a buyer and seller, by giving and receiving of which the bargain was ratified; or a deposit, which was to be restored when the thing promised was given. From the use of the term in Genesis, which the apostle puts here in Greek letters, we may at once see his meaning above, and in Ephesians 1:14; the Holy Spirit being an earnest in the heart, and an earnest of the promised inheritance means a security given in hand for the fulfillment of all God's promises relative to grace and eternal life. We may learn from this, that eternal life will be given in the great day to all who can produce the arrhabon, or pledge. He who is found then with the earnest of God's Spirit in his heart, shall not only be saved from death, but have that eternal life of which it is the pledge, the earnest, and the evidence. Without this arrhabon there can be no glory. See the whole case of Judah and Tamar, Genesis 38:15 (note), etc., and the notes there.

Who hath also sealed us, and given the (y) earnest of the Spirit in our hearts.
(y) An earnest is whatever is given to confirm a promise.

Who hath also sealed us,.... "Two" things more are here attributed to God; "first", the sealing of his people. The use of seals is various, as to denote property in things, to distinguish one thing from another, to show esteem and affection for persons or things, and for security and protection, and to hide and conceal; all which might be applied to sealing, as expressive of the grace of God to his people, in claiming a property in them, distinguishing them from the rest of the world, setting his affections on them, securing and protecting their persons, and hiding them under the shadow of his wings: but sometimes a seal is used to certify, make sure, or assure the truth of a thing; see John 3:33 in which sense the word "sealing" is used here, and intends that assurance which God gives his people of their interest in his love, and the covenant of grace; of their election of God, and redemption by Christ; of their interest in Christ, and union with him; of their justification by him, and adoption through him; of the truth of grace in their hearts, their perseverance in it, and sure and certain enjoyment of eternal glory. The persons thus sealed are not carnal and unconverted persons, only believers in Christ, and these, after they commence such; the seal by which they are sealed, is not any of the ordinances, as circumcision under the Old Testament, or baptism, or the Lord's supper under the New; for these are no seals, nor are they ever so called; but the Spirit of God himself, as the Holy Spirit of promise; for the same who, in the next clause, is called the earnest, is the seal; see Ephesians 1:13. "Secondly", the giving of the earnest of the Spirit:
and given the earnest of the Spirit in our hearts: by "the Spirit" is meant, not the gifts and graces of the Spirit merely, but the Spirit of God and Christ himself; who was concerned in the creation of the world, in inditing the Scriptures, in forming and filling the human nature of Christ, and in his resurrection from the dead; he himself is given as an "earnest": the word here used, and in 2-Corinthians 5:5 is the Hebrew word and comes from which signifies "to become a surety, to give a pledge"; and is used for a pledge in covenants and bargains, both in Scripture, see Genesis 38:17, and in Jewish writings (d); which is given as an earnest, and in part of what it is a pledge of, and is never returned: the Spirit of God is an earnest or pledge of the heavenly inheritance, which is not only prepared for us, and promised to us, and Christ is in the possession of in our nature, in our room and stead, and as our representative; but the Spirit of God also is sent down "into our hearts" as a pledge of it; where he dwells as in his temple, supplies us with all grace, witnesses to us our sonship, and assures us of the heavenly glory: and as such he is "given"; and an unmerited free grace gift he is; for him to be given in this manner, and for such a purpose, is a wonderful display of the love of the Father, and of the Son, and is a surprising instance of his grace and condescension of the Spirit, and for which we should be abundantly thankful.
(d) Midrash Megillath Esther, fol. 94. 2. Maimon. Hilch. Mechira, c. 7. sect. 1. & c. 11. sect. 4.

sealed--A seal is a token assuring the possession of property to one; "sealed" here answers to "stablisheth us" (2-Corinthians 1:21; 1-Corinthians 9:2).
the earnest of the Spirit--that is, the Spirit as the earnest (that is, money given by a purchaser as a pledge for the full payment of the sum promised). The Holy Spirit is given to the believer now as a first instalment to assure him his full inheritance as a son of God shall be his hereafter (Ephesians 1:13-14). "Sealed with that Holy Spirit of promise which is the earnest of our inheritance until the redemption of the purchased possession" (Romans 8:23). The Spirit is the pledge of the fulfilment of "all the promises" (2-Corinthians 1:20).

Who also hath sealed us - Stamping his image on our hearts, thus marking and sealing us as his own property. And given us the earnest of his Spirit - There is a difference between an earnest and a pledge. A pledge is to be restored when the debt is paid; but an earnest is not taken away, but completed. Such an earnest is the Spirit. The first fruits of it we have Romans 8:23; and we wait for all the fulness.