Answer:
What is it that no man ever yet did see, which never was, but always is to be?
I tremble at each breath of air, and yet can heaviest burdens bear.
Left to right Iām quite bright. Right to left I might bite.
I don't think or eat or slumber. Or move around or fear thunder. Just like you I look the same but I can't harm you or be your bane.
I am always in front of you, but you will never see me. What am I?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.