Answer:
who do you think you know but sometimes you don't
The more of them you take, the more you leave behind. What are they?
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
Upon me you can tread, though softly under cover. And I will take you places, that you have yet to discover. I'm high, and I'm low, though flat in the middle. And though a joy to the children, adults think of me little.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
What is always coming but never arrives?