INDWELLING SIN & CORRUPTION IN THE BELIEVER

The worst enemies of the children of God are within them, namely indwelling sin and corruption, which, in the depth of sovereign wisdom, are not expelled during this life; but left for their exercise and trial, and for the discovery of the power of the grace of their King. And He manifests His power in keeping alive in them the spark of holy fire in the midst of an ocean of corruption.

—Thomas Boston.