Answer:
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
I am the yellow hem of the sea's blue skirt.
Break it and it is better, immediately set and harder to break again.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Where do you go in through one hole and come out through two holes at the same time?
What gets broken without being hold?