And walk in love as Christ also hath loved us. Having called on us to imitate God, he now calls on us to imitate Christ, who is our true model. We ought to embrace each other with that love with which Christ has embraced us, for what we perceive in Christ is our true guide. And gave himself for us. This was a remarkable proof of the highest love. Forgetful, as it were, of himself, Christ spared not his own life, that he might redeem us from death. If we desire to be partakers of this benefit, we must cultivate similar affections toward our neighbors. Not that any of us has reached such high perfection, but all must aim and strive according to the measure of their ability. An offering and a sacrifice to God of a sweet smelling savor. While this statement leads us to admire the grace of Christ, it bears directly on the present subject. No language, indeed, can fully represent the consequences and efficacy of Christ's death. This is the only price by which we are reconciled to God. The doctrine of faith on this subject holds the highest rank. But the more extraordinary the discoveries which have reached us of the Redeemer's kindness, the more strongly are we bound to his service. Besides, we may infer from Paul's words, that, unless we love one another, none of our duties will be acceptable in the sight of God. If the reconciliation of men, effected by Christ, was a sacrifice of a sweet smelling savor, [1] we, too, shall be "unto God a sweet savor," (2-Corinthians 2:15,) when this holy perfume is spread over us. To this applies the saying of Christ, "Leave thy gift before the altar, and go and be reconciled to thy brother." (Matthew 5:24.)

Footnotes

1 - "The offering, in being presented to God, was meant to be, and actually was, a sweet savor to Him. The phrase is based on the peculiar sacrificial idiom of the Old Testament. (Genesis 8:21; Leviticus 1:9, 13, 17; 2:9, 12; 3:5.) It is used typically in 2-Corinthians 2:14, and is explained and expanded in Philippians 4:18 -- a sacrifice acceptable, well-pleasing to God.' The burning of spices or incense, so fragrant to the Oriental senses, is figuratively applied to God." -- Eadie.

And walk in love - That is, let your lives be characterized by love; let that be evinced in all your deportment and conversation; see notes on John 13:34.
As Christ also hath loved us - We are to evince the same love for one another which he has done for us. He showed his love by giving himself to die for us, and we should evince similar love to one another; 1-John 3:16.
And hath given himself for us - "As Christ also hath loved us." We are to evince the same love for one another which he has done for us He showed his love by giving himself to die for us, and we should evince similar love to one another; 1-John 3:16. "And hath given himself for us." This is evidently added by the apostle to show what he meant by saying that Christ loved us, and what we ought to do to evince our love for each other. The strength of his love was so great that he was willing to give himself up to death on our account; our love for our brethren should be such that we would be willing to do the same thing for them; 1-John 3:16.
An offering - The word used here - προσφορά prosphora - means properly that which is "offered to God" in any way; or whatever it may be. It is, however, in the Scriptures commonly used to denote an offering without blood - a thank-offering - and thus is distinguished from a sacrifice or a bloody oblation. The word occurs only in Acts 21:26; Acts 24:17; Romans 15:16; Ephesians 5:2; Hebrews 10:5, Hebrews 10:8,Hebrews 10:10, Hebrews 10:14, Hebrews 10:18. It means here that he regarded himself as an offering to God.
And a sacrifice - θυσίαν thusian. Christ is here expressly called a "Sacrifice" - the usual word in the Scriptures to denote a proper sacrifice. A sacrifice was an offering made to God by killing an animal and burning it on an altar, designed to make atonement for sin. It always implied the "killing" of the animal as an acknowledgment of the sinner that he deserved to die. It was the giving up of "life," which was supposed to reside in the "blood" (see the notes on Romans 3:25), and hence it was necessary that "blood" should be shed. Christ was such a sacrifice; and his love was shown in his being willing that his blood should be shed to save people.
For a sweet-smelling savour - see the notes on 2-Corinthians 2:15, where the word "savor" is explained. The meaning here is, that the offering which Christ made of himself to God, was like the grateful and pleasant smell of "incense," that is, it was acceptable to him. It was an exhibition of benevolence with which he was pleased, and it gave him the opportunity of evincing his own benevolence in the salvation of people. The meaning of this in the connection here is that the offering which Christ made was one of "love." So, says Paul, do you love one another. Christ sacrificed himself by "love," and that sacrifice was acceptable to God. So do you show love one to another. Sacrifice everything which opposes it. and it will be acceptable to God. He will approve nil which is designed to promote love, as he approved the sacrifice which was made, under the influence of love, by his Son.

And walk in love - Let every act of life be dictated by love to God and man.
As Christ - hath loved us - Laying down your lives for your brethren if necessary; counting nothing too difficult to be done in order to promote their eternal salvation.
Hath given himself for us - Christ hath died in our stead, and become thereby a sacrifice for our sins.
An offering - Προσφορα· An oblation, an eucharistic offering; the same as מנחה minchah, Leviticus 2:1, etc., which is explained to be an offering made unto the Lord, of fine flour, with oil and frankincense. It means, any offering by which gratitude was expressed for temporal blessings received from the bounty of God.
A sacrifice - Θυσια· A sin-offering, a victim for sin; the same as זבח zebach, which almost universally means that sacrificial act in which the blood of an animal was poured out as an atonement for sin. These terms may be justly considered as including every kind of sacrifice, offering, and oblation made to God on any account; and both these terms are with propriety used here, because the apostle's design was to represent the sufficiency of the offering made by Christ for the sin of the world. And the passage strongly intimates, that as man is bound to be grateful to God for the good things of this life, so he should testify that gratitude by suitable offerings; but having sinned against God, he has forfeited all earthly blessings as well as those that come from heaven; and that Jesus Christ gave himself ὑπερ ἡμων, in our stead and on our account, as the gratitude-offering, προσφορα, which we owed to our Maker, and, without which a continuance of temporal blessings could not be expected; and also as a sacrifice for sin, θυσια, without which we could never approach God, and without which we must be punished with an everlasting destruction from the presence of God and the glory of his power. Thus we find that even our temporal blessings come from and by Jesus Christ, as well as all our spiritual and eternal mercies.
For a sweet-smelling savor - Εις οσμην ευωδιας· The same as is expressed in Genesis 8:21; Leviticus 1:9; Leviticus 3:16 : ריח ניהוח ליהוה reiach nichoach laihovah, "a sweet savor unto the Lord;" i.e. an offering of his own prescription, and one with which he was well pleased; and by accepting of which he showed that he accepted the person who offered it. The sweet-smelling savor refers to the burnt-offerings, the fumes of which ascended from the fire in the act of burning; and as such odors are grateful to man, God represents himself as pleased with them, when offered by an upright worshipper according to his own appointment.

And walk in love,.... To God; to which the saints are obliged, not only by the law of God, which requires it, but by the goodness of God, and the discoveries of his love to them; and which shows itself in fearing to offend him, in a conformity to his will, in making his glory the chief end of all actions, and in loving all that belong to him: and also the saints should walk in love to Christ; who is to be loved fervently, constantly, in sincerity, with all the heart, and above all creatures and things; because of the loveliness of his person, the love he bears to them, and the things he has done for them, and the relations he stands in to them; and which is manifested in keeping his commands, in delighting in his presence, and in a concern at his absence: and also they should walk in love to one another, which is chiefly designed; which is Christ's new commandment, and is an evidence of regeneration; and without which a profession of religion is in vain: and to "walk" in love, is not merely to talk of it, but to exercise it; and to do all that is done for God, and Christ, and the saints, from a principle of love; and to advance, increase, and abound in it, and to go on and continue therein: the example to be copied after, and which carries in it an argument engaging to it is,
as Christ also hath loved us; with a love exceeding great and strong, which is wonderful, inconceivable, and unparalleled; and even as the Father has loved him; with a love that is free and sovereign, unchangeable and everlasting, of which he has given many instances; and a principal one is hereafter mentioned: the "as" here is a note of similitude, not of equality; for it cannot be thought that the saints should love God, or Christ, or one another, with a love equal to Christ's love to them, but only that theirs should bear some likeness to his: the Alexandrian copy and Ethiopic version, instead of "us", read "you":
and hath given himself for us; not the world, and the things of it, which are his; not men, nor angels, nor animals, but himself; he gave away his time, service, and strength; his name, fame, and reputation; all the comforts of life, and life itself; his whole human nature, soul and body, and that as in union with his divine person; and that not only for the good of his people, but in their room and stead; not for angels, nor for all men, but for his chosen ones, the church, his sheep, his people, and when they, were sinners; in the following manner, and for the said purpose:
an offering and a sacrifice to God, for a sweet smelling savour; Christ was both priest and sacrifice; he offered up himself a propitiatory sacrifice for the sins of his people, to expiate them, and make reconciliation and satisfaction for them; and this he offered up to God, against whom they had sinned, and whose justice must be satisfied, who called him to this work, and engaged him in it; and which was well pleasing to him, he smelled a sweet savour of rest in it, it being an unblemished sacrifice, and voluntarily offered up; and was complete, full, and adequate to the demands of his justice; by it sin was put away, finished, and made an end of, and his people perfected for ever; see Genesis 8:20.

And--in proof that you are so.
walk in love--resuming Ephesians 4:1, "walk worthy of the vocation."
as Christ . . . loved us--From the love of the Father he passes to the love of the Son, in whom God most endearingly manifests His love to us.
given himself for us--Greek, "given Himself up (namely, to death, Galatians 2:20) for us," that is, in our behalf: not here vicarious substitution, though that is indirectly implied, "in our stead." The offerer, and the offering that He offered, were one and the same (John 15:13; Romans 5:8).
offering and a sacrifice--"Offering" expresses generally His presenting Himself to the Father, as the Representative undertaking the cause of the whole of our lost race (Psalm 40:6-8), including His life of obedience; though not excluding His offering of His body for us (Hebrews 10:10). It is usually an unbloody offering, in the more limited sense. "Sacrifice" refers to His death for us exclusively. Christ is here, in reference to Psalm 40:6 (quoted again in Hebrews 10:5), represented as the antitype of all the offerings of the law, whether the unbloody or bloody, eucharistical or propitiatory.
for a sweet-smelling savour--Greek, "for an odor of a sweet smell," that is, God is well pleased with the offering on the ground of its sweetness,and so is reconciled to us (Ephesians 1:6; Matthew 3:17; 2-Corinthians 5:18-19; Hebrews 10:6-17). The ointment compounded of principal spices, poured upon Aaron's head, answers to the variety of the graces by which He was enabled to "offer Himself a sacrifice for a sweet-smelling savor." Another type, or prophecy by figure, was "the sweet savor" ("savor of rest," Margin) which God smelled in Noah's sacrifice (Genesis 8:21). Again, as what Christ is, believers also are (1-John 4:17), and ministers are: Paul says (2-Corinthians 2:17) "we are unto God a sweet savor of Christ."