Answer:
I destroy your home from the inside out.
I go through a door but never go in and never come out.
What has a neck but no head?
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure, a matter of course. What am I?
I am born in fear raised in truth and I come to my own in deed. When comes a time that I'm called forth I come to serve the cause of need.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?