Day 2 - Part 1
Christians should be free from all habitual sin. This is stated many places in Scripture, but the book of 1 John, which was written, "that we might know that we have eternal life" (1 John 5:13), states this truth clearly:
This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all. 6 If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. 7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
1 John 1:5-7
When we talk about "habitual sin" we are referring here to sin that has become a persistent habit. We are not referring to sin that happens occasionally, but rather we are referring to sin that is practiced often. Some might use the term "life-dominating sin" here, or even sin that has "mastered" us and taken us "captive." "Habitual sin", as shown in 1 John 1:5-7 above is described as "walking in darkness", and the opposite as "practicing the truth". The metaphor of "walking" indicates the direction of one's life.
Another good definition of "habitual sin" can be seen in 1 John 3:6-9:
6 No one who abides in him keeps on sinning; no one who keeps on sinning has either seen him or known him. 7 Little children, let no one deceive you. Whoever practices righteousness is righteous, as he is righteous. 8 Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. 9 No one born of God makes a practice of sinning, for God's seed abides in him, and he cannot keep on sinning because he has been born of God.
1 John 3:6-9 (ESV)
This passage defines "habitual sin" as the "practice of sinning ...