Silent companion in nightly repose, I cradle the thoughts nobody knows. Soft fortress and fleet in disguise, Caught in a toss, yet still no cries. Feathered or foamed, I yield to your will, Guess what I am, your rest's gentle thrill.

I am the mouth that never speaks, My teeth of steel, the dark it seeks.

A silent mimic standing tall, reflecting truths without a call. Always present in the hall, revealing secrets to one and all.

Cut off my first, yet I sound the same, I linger in linen, in air, in flame.

Though I have a neck, I never wear a tie, Standing by your side, yet never say hi.I'm filled with energy, but never take a nap, Touch me in darkness, and I’ll bridge the gap. What am I?