These venomous creatures!

(Thomas Watson, "The Christian's Charter")

Sin is a leprous spot. It makes everything we touch
unclean. Thus in every man naturally, there is a
fretting leprosy of sin, pride, unbelief, lust, etc.
These are leprous spots.

Sin is a defiling thing, it makes us red with guilt—and
black with filth! Sin is compared to a menstrual cloth.
Sin draws the Devil's picture in a man:
  malice is the Devil's eye;
  oppression is his hand;
  hypocrisy is his cloven foot!

At last death comes—and the saint is freed from the leprosy!
Death is the last and best physician, which cures all diseases
and sins—the aching head and the unbelieving heart. Sin was
the midwife which brought death into the world; and death
shall be the grave to bury sin! O the privilege of a believer!

The Persians had a certain day in the year, wherein they
used to kill all serpents and venomous creatures. Such a
day as that, will the day of death be to the true Christian.
This day the old serpent dies in a believer, which has so
often stung him with temptations! This day the sins of the
these venomous creatures—shall all be destroyed!