18 We know [with confidence] that anyone born of God does not habitually sin; but He (Jesus) who was born of God [carefully] keeps and protects him, and the evil one does not touch him. 19 We know [for a fact] that we are of God, and the whole world [around us] lies in the power of the evil one [opposing God and His precepts]. 20 And we [have seen and] know [by personal experience] that the Son of God has [actually] come [to this world], and has given us understanding and insight so that we may [progressively and personally] know Him who is true; and we are in Him who is true—in His Son Jesus Christ. This is the true God and eternal life. 1 John 5:18-20
If we are truly following Christ it is impossible to habitually sin. Habitual sin is when we are living in sin and our lives are dominated by sin. The reason this is not possible is because Christ has set us free from the curse of sin and death. It is the Holy Spirit who empowers us to walk in victory over temptation and sin. The only reason a persons life will be dominated by sin is if they are failing to abide daily in Jesus Christ. Failing to abide in the Lord is a recipe for disaster and destruction.
We who have chosen to follow Christ are sons and daughters of God. The entire world is deceived by the power and deception of Satan. The Lord by His grace and mercy chose to come to this earth and lay down His life. To become flesh and blood, live without sin, and give His very life in place of our lives. Those who come to Christ are set free from the darkness and wickedness of this world. We will be hated in this world but we have nothing to fear. In all that we will face the Lord will empower us and equip us to be victorious. But the key is abiding daily in Him.
John actually saw the Lord and walked with Him during His earthly ministry. John was a eye witness to all that Jesus did with the other apostles. He was part of Jesus inner circle with James, and Peter and John knew Christ intimately. John refers to himself in his gospel as the disciple whom Jesus loved. John during the ministry of Christ was known as a son of thunder with his brother James. But as you study all that John wrote in the biblical record it is clear to see how his life was transformed by the Lord because he often focuses on the love of God.
It is the Lord who gives us understanding and insight and we progressively come to grow in the knowledge of who He is and His kingdom. Our growth with Him is progressive because as we come to study His word, we naturally grow in greater understanding of who He is. It is only through Jesus Christ that eternal life is found. For those who desire to follow Him they must deny themselves and pick up their cross. The more we draw near the more we come to know Him and His heart.