Actions, statements, and thoughts which fall outside of that which is in the Holy
light of the God-Emperor of Mankind, and, thus, into the unholy darkness of the Ruinous Powers. Inquisitors, through their holy judgement, seek out and destroy heresy wherever they find it, through any means necessary, including the drastic measure of exterminatus.
Discussions on what constitutes Heresy is considered Heretical; this is not because no one can come to a decision on what is heretical and not-heretical, this thought is also heretical.
Reading this
definition is heretical.
Heresy is like a tree, its roots lie in the darkness whilst its leaves wave in the
sun and to those who suspect nought, it has an attractive and pleasing appearance. Truly, you can prune away its branches, or even cut the tree to the ground, but it
will grow up again ever the stronger and ever more comely. Yet all awhile the root grows
thick and black, gnawing at the bitter soil, drawing its nourishment from the darkness, and growing even greater and more deeply entrenched.
Such is the nature of heresy, and this is why it is so
hard to destroy, for it must be eradicated leaf, branch, trunk and root. It must be exorcised utterly or it
will return all the stronger, time and time again, until it is too
great to destroy. Then we are doomed.
