Riddle #1171

They fight against me day and night, They try in vain with all their might. But when I win the final strain, I close their eyes and end the pain.

What always runs, but never walks, often murmurs, never talks, has a bed, but never sleeps, has a mouth, but never eats?

To you, rude would I never be, Though I flag my tongue for all to see. What am I?

I am seen in the water if seen in the sky, I am in the rainbow, A jay's feather, And lapis lazuli.

It can be cracked, it can be made, It can be told, it can be played. What is it?

A slender body, a tiny eye, no matter what happens, I never cry. What am I?

Pronounced as one letter, And written with three, Two letters there are, And two only in me. I’m double, I’m single, I’m black blue and gray, I’m read from both ends, And the same either way.

I have just one, but with eight to spare, I am usually friendly, but I sometimes act like I don't care. What am I?

I don't have wings, but I can fly. I don't have eyes, but I will cry! What am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place.

I am a home of knowledge, both banal and profound. In grand halls and small homes I can be found. I am a home for things of many leaves, but my many residents are not living trees. What am I?