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
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).
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
The fallen condition of all humankind in Adam is not the result of mere social conditioning but is such "by nature" (φύσει, physei)Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 152.
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
we must never look at any sin in our past life in any way except that which leads us to praise God and to magnify His grace in Christ Jesus.Spiritual Depression (75)
Can you imagine a soldier going into battle with the aim of "not getting hit very much"? The very suggestion is ridiculous. His aim is not to get hit at all! Yet if we have not made a commitment to holiness without exception, we are like a soldier going into battle with the aim of not getting hit very much. The Pursuit of Holiness (96)
Am I saying that a Christian is without sin? No, because in 1 John we learn that Christians do sin and if any man does not acknowledge his sin he knows not God. He's not walking in the light. So what is the difference? What am I really getting at? What I am getting at is this: If you are a genuinely born again Christian a child of God. You will walk in the way of righteousness as a style of life, and if you step of that path of righteousness the father will come for you. he will discipline you . he will put you back on that path. But if you profess to have gone though the narrow gate, and yet you live in the broad way. Just like all the other people in your highschool just like all the other people who are carnal and wicked. The Bible wants you to know that you should be terribly terribly afraid. You know not God. Sermon:Shocking Youth Message
And, moreover, there is no less fatal mistake where we make the object of this duty to be only some particular lusts, or the fruits of them in actual sins, as was before observed. This is the way with many. They will make head against some sins, which on one account or other they find themselves most concerned in; but if they will observe their course, they shall find with how little success they do it. For the most part, sin gets ground upon them, and they continually groan under the power of its victories; and the reason is, because they mistake their business. Contests against particular sins are only to comply with light and convictions. Mortification, with a design for holiness, respects the body of sin, the root and all its branches. The first will miscarry, and the latter will be successful.https://ccel.org/ccel/owen/pneum/pneum.i.viii.viii.html