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.

At the sound of me, men may dream or stamp their feet. At the sound of me, women may laugh or sometimes weep.

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

With thieves I consort, with the vilest, in short, I'm quite at ease in depravity; Yes all divines use me, And savants can't lose me, For I am the center of gravity.

The front of me is the source of a song Or to kiss with a fervor of love lifelong. My back is a plant fit for a queen, Crafted by needle, chemical, or machine.

Two sisters we are, one is dark and one is fair, In twin towers dwelling we're quite the pair, One from land and one from sea, Tell us truly, who are we?

I have three eyes but only one leg. I still close one even if you beg. What am I?

Until I am measured I am not known. Yet how you miss me when I have flown.

Slayer of regrets, old and new, sought by many, found by few. What am I?

I’m teary-eyed but never cry, silver-tongued, but never lie. double-winged, but never fly, air-cooled, but never dry. 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.