That white devil!

(Thomas Brooks, "The Privy Key of Heaven" 1665)

While the disciples were healing diseases and casting
out demons, the proud white devil was a-stirring in
their own souls; as is evident by that gentle rebuke
which our Savior gives them in Luke 10:20, "Don't
rejoice that the spirits submit to you."

There is no pious duty which a Christian performs, but
one white devil or another--one lust or another--will be
still dogging and following of him to that duty. There is
no public duty, there is no family duty, there is no private
duty which a Christian performs--but either that white
devil pride, or that white devil hypocrisy, or that white
devil vainglory; or else some one or another white devil
will follow the soul, near at heel to it.