When God pardons

(William S. Plumer, "Sinners Saved by Unmerited Kindness")

One unpardoned sin would destroy a soul forever.

Many words in Scripture point towards forgiveness, such as:
  peace with God,
  not imputing iniquity,
  taking away sin,
  bearing sin,
  making an end of transgression,
  covering sin,
  forgetting sin,
  not remembering iniquity,
  washing, cleansing and removing sin,
  casting it into the sea, or behind the back,
  scattering it like a cloud,
  burying it,
  blotting it out,
  pardoning it.

The forgiveness of sins is free. It is "without money and
without price." We can do nothing to merit it, or prepare
ourselves for it. When God pardons, He pardons:
  all sins,
  original sin and actual sin,
  sins of omission and of commission,
  secret and open sins,
  sins of thought, word and deed.

To those who believe in Jesus, all is freely forgiven.
Full pardon, or none at all, is what God gives. Nor is
this gift ever revoked by God. When He forgives, He
forgives forever!

"Blessed is he whose transgressions are forgiven,
 whose sins are covered. Blessed is the man whose sin
 the Lord does not count against him." Psalm 32:1-2