Some people think that the whole of sanctification is like justification in the sense that it is an immediate act of God whereby he causes us to achieve perfect holiness in thought and conduct, and this implies that true Christians no longer commit sins. Does sanctification begin at regeneration ? The Bible describes it as a growth process, so that a person increasingly thinks and behaves in a way that pleases God, and that conforms to the likeness of Christ. A number of passages in the Bible give the impression that a person ceases to sin altogether after regeneration. For example, John says, "No one who is born of God will continue to sin, because God's seed remains in him; he cannot go on sinning, because he has been born of God" (1 John 3:9). In a Bible class I took a year ago the question came up, Is a person truly saved if His actions do not change.? The example given was a drug addict coming to Salvation in the outward formalities of saying they believe and receiving the prayer from the pastor, and then the next day going back to using drugs. The class became a heated argument of " Once saved always saved" on one side and the other side arguing "The person never truly received Salvation".. I'm confused on this issue because the Bible has different Scriptures that could support either side.