Answer:
Once you know it exists, it no longer exists. What is it?
Cut the wrong wire and it goes boom
What gives life and love, and is there till they die? What can hide you and find you, heal you and feed you but should never give up on you?
What devours all and can kill a king. Destroy a town and crushes mountains down?
Never ahead, ever behind, yet flying swiftly pastΝΎ For a child I last forever, for adults I'm gone too fast.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?