This article discusses sanctification, both definitive and progressive. It critiques antinomianism and legalism, and shows the theological problems with perfectionism.

According to the Scriptures there is a continual struggle between the old and new nature within every converted man. Perfectionism teaches that it is possible for a Christian in this life to attain to a state of sinless perfection. This article reaffirms the inescapability of the struggle between the two natures, and describes the character of the struggle.

The article reviews some of the works of B.B Warfield, giving special attention to Warfield's critique of the teaching of perfectionism.

This article is on the doctrine of progressive sanctification, and also discusses holiness and perfectionism. At the core the article lies Lord's Day 44 of the Heidelberg Catechism.