Do you mortify; do you make it your daily work; be always at it whilst you live; cease not a day from this work; be killing sin or it will be killing you.Of the Mortification of Sin in Believers Chapter 2
That is why the unregenerate person cannot understand the urgency of the gospel message: until they see the depth of their sin and the holiness of God, they find no reason to seek remedy for their condition.
When I turn to the map of the world I must say the same thing. It matters not what quarter I examine: I find men's hearts are everywhere the same, and everywhere wicked. Sin is the family disease of all the children of Adam.Old Paths, Ch 7
You can never part with sin soon enough; it is a cursed inmate, that will surely bring mischief upon the soul that harbours it. It will set its own dwelling on fire.Works 7:147
At the heart of all sin is a lie. The lie says to all of us in our sin, "The act you are now doing, the desire or attitude you are now feeling is not very bad because there are much worse things, not very bad because everyone else experiences the same things, not very bad because you can't help it, not very bad because there is no God, or, if that won't work, God knows you are but frail and weak and he will tolerate and pity your sin." There are a thousand distortions of the truth which sin brings with it into the human heart, so that Jeremiah cries out, "The heart is deceitful above all things and desperately corrupt; who can understand it?" (17:9).
It is typical to hear divine grace defined as "God's undeserved favor," but this does not capture the idea communicated here in Eph 2 or in other places in Paul. As this whole passage shows, God's grace, which is emphasized here by putting it first in the colon* (v. 8a), is actually God's favor granted to those who deserve his wrath (v. 3). It is not just undeserved, as if the people whom God befriends were neutral. It is act of immense favor bestowed on those who lie under God's just condemnation as transgressors and sinners. Hence, a better quick definition is: "God's favor despite human demerit."Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 159–160.
How monstrous a thing is rebellion! How direful a doom is prepared for the ungodly! My soul, never laugh at sin's fooleries, lest thou come to smile at sin itself. It is thine enemy, and thy Lord's enemy. View it with detestation
Humans contribute nothing of their own to this salvation, since even believing (which the elect are indeed enabled to do) is a divine gift (cf. Rom 3:24–25). The key to this in the context of Eph 2:8 is what Paul had been driving home so forcefully up until now: Before God's gracious intervention believers were hopelessly dead, with their wills imprisoned by nature (φύσει, physei) in acts that led only to transgression and sin (2:1–5a, 12).
Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 161.
The main theme of Ephesians is easy to summarize with the phrase unity in the inaugurated new creation. Paul starts out teaching at some length on the church's unity as it is rooted in God's counsel and then in his redemptive accomplishment in the incarnate Son sealed to believers in the Holy Spirit. We see throughout Ephesians the rich, biblical teaching of a full and free salvation accomplished by the triune God and received by faith alone. But biblical faith is a living faith, which necessarily manifests its presence through loveEphesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 35
some things are sins and punishment of sin simultaneously, some are sins and the cause of sin, but others are sins and the cause and punishment of sin.The Sentences, Book 2, Distinction 36, C1