Answer:
Long and think, red within, with a nail at the end.
Come up and let us go. Go down and here we stay
A little house full of meat, no door to go in and eat.
Though blind as well, can lead the blind well.
What moves without seeing and cries without eyes?
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.