6 Then the LORD said to Cain, "Why are you angry? Why is your face downcast? 7 If you do what is right, will you not be accepted? But if you do not do what is right, sin is crouching at your door; it desires to have you, but you must master it."
15 What then? Shall we sin because we are not under law but under grace? By no means! 16 Don't you know that when you offer yourselves to someone to obey him as slaves, you are slaves to the one whom you obey--whether you are slaves to sin, which leads to death, or to obedience, which leads to righteousness?
1 Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off everything that hinders and the sin that so easily entangles, and let us run with perseverance the race marked out for us. 2 Let us fix our eyes on Jesus, the author and perfecter of our faith, who for the joy set before him endured the cross, scorning its shame, and sat down at the right hand of the throne of God.
“Sin is the dare of God’s justice, the rape of His mercy, the jeer of His patience, the slight of His power, and the contempt of His love.” John Bunyan
“Sin is a living, breathing organism with will and intent seeking to destroy us. It is referred to in the Bible as crouching at our door. It is a roaring lion infecting and controlling natural man. It is alive and well.” Dr. Omar Hamada
“I remember two things: that I am a great sinner, and that Christ is a great Savior.” Newton