Paul exhorts the Ephesians to “be imitators of God” and to “walk in love,” because that is fitting for those who are beloved children of the Lord. Christ first loved us and offered Himself up on our behalf, “a fragrant offering and sacrifice to God” (Ephesians 5:1-2). Yet as Christ Himself is a pleasing odor, so also Christians, being in Christ, are called to be a pleasing aroma to God. This seems to be the guiding thought behind the epistle lesson for today.
Following the flood, Noah offered up some of every clean animal which was with him on the ark, and “when the Lord smelled the pleasing aroma,” He inwardly promises never to curse the ground again on account of sin (Genesis 8:21-22). Yet the odor of sacrifice is not pleasing for its own sake. “I hate, I despise your feasts, and I take no delight in your solemn assemblies. Even though you offer me your burnt offerings and grain offerings, I will not accept them” (Amos 5:21-24). “Bring no more vain offerings; incense is an abomination to me” (Isaiah 1:11-15). For the smell to be pleasing to the Lord, the one offering it must be acceptible in His sight, fit for His worship. Christ alone is without any blemish or spot, the perfect lamb offered up to the Father for the sake of sinful men. Christians, then, being in Christ, have been made fit for His worship, clean in His sight, through the death and resurrection of Jesus.
The burnt offerings of Leviticus 1 waft up a pleasing aroma to the Lord, but the shedding of blood points to the sacrifice of Christ (Hebrews 10). Such an aroma properly belongs to Christ alone, since through Christ we have been reconciled to God. The grain offerings of Leviticus 2, on the other hand, also waft up a pleasing aroma to the Lord, but for a different reason. Grain offerings involve no shedding of blood, and therefore are not meant as forgiveness, but rather as thanksgiving. Only one who has already been made fit for the worship of God, ceremonially clean, is able to offer such a sacrifice to Him.
Salt formed an important part of such sacrifices. Leviticus 2:13 states that “you shall season all your grain offerings with salt. You shall not let the salt of the covenant with your God be missing from your grain offering; with all your offerings you shall offer salt.” Within the context of the New Testament, therefore, salt shows the purpose of grain offerings within the Christian life. Christ tells us to “have salt in yourselves, and be at peace with one another” (Mark 9:50). Paul also exhorts the Colossians to “let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer each person” (Colossians 4:6). If our speech and conduct is to be salted, then they form our spiritual sacrifice to the Lord, which Pauls says in Romans 12:1 and Peter says in 1 Peter 2:5.
If our speech and conduct are the substance of our spiritual sacrifice to the Lord, then it also follows that such sacrifice, like the sacrifices of old, should be without blemish or spot. Offering lame or blind or sick animals, for example, is offensive to God (Malachi 1:8). More specifically with regard to grain offerings, leaven or honey rendered them unfit (Leviticus 2:11). A little leaven, after all, leavens the whole lump (Galatians 5:9; see also 1 Corinthians 5:6-8).
Participating in sin blemishes the spiritual sacrifice and renders it unfit for God. Yet Paul emphasizes that even speaking of such things are not fitting for a Christian for the same reason. Paul rebukes such things, as is fitting, but to season our spiritual sacrifice with leaven is decidedly dangerous. Leaven, having leavened the whole lump, renders one not only unfit for worship, but outside of the inheritance altogether. To use a different metaphor, it is far better to resist sin being planted in the first place than to attempt to cut down the plant when it is in full bloom!
It must be remembered, of course, that even within the context of the old sacrificial system, only those who have been made fit for the worship of God were able to come into His presence. Christ offered Himself up for us and made us to be His own through the shedding of His blood. The Holy Spirit changes our hearts of stone into hearts of flesh. Only through the working of the Holy Spirit are we able to resist sin at all. Yet seasoning our sacrifice with yeast rather than salt seems tantamount to tempting the Holy Spirit. Paul says later in this chapter: “Take no part in the unfruitful works of darkness, but instead expose them. For it is shameful even to speak of the things that they do in secret” (Ephesians 5:11-12). Speaking of such things in a way that does not rebuke them as darkness is akin to participating in them. “For what fellowship has light with darkness” (2 Corinthians 6:14-16)? Christians must resist the temptation of sin even in its earliest stages, because Christ has made us to be His own, even while we were still His enemies.