1 John 4:1
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
2 Timothy 3:16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
that is correct...including about the spirit of false Christianity..the spirit of apostasy which is rampant in the churches of today. Sadly.