Answer:
A dagger thrust at my own heart dictates the way I'm swayed. Left I stand and right I yield to the twisting of the blade. What am I?
I am alive without breath and cold as death. I am never thirsty but always drinking.
You throw me out when you use me and take me in when you are done.
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
I am shared by goats devils and unicorns.
What body part is pronounced as one letter, but written with three, only two different letters are used?