God's sin-purging medicine

(Arthur Pink, "A Fourfold Salvation" 1938)

"God chastens us for our good—that we may
 share in His holiness." Hebrews 12:10

Chastening is God's sin-purging medicine, sent . . .
  to wither our fleshly aspirations,
  to detach our hearts from carnal objects,
  to deliver us from our idols, and
  to wean us more thoroughly from the world.

God has bidden us, "put to death whatever in you
is worldly: sexual immorality, impurity, lust, evil
desire, and greed." (Col. 3:5) If we refuse to comply
with this unpleasant task, then we may expect God
Himself to use the pruning knife upon us!

"My son, do not take the Lord's chastening lightly,
or faint when you are reproved by Him." (Heb. 12:5)
This is a beneficial warning. So far from despising the
Lord's chastening, we should be grateful for it—that
God cares so much and takes such trouble with us,
and that His bitter medicine produces such healthful
effects. "No discipline seems pleasant at the time, but
painful. Later on, however, it produces a harvest of
righteousness and peace for those who have been
trained by it." (Hebrews 12:11)