Answer:
I am commonly ate before I'm born and after I'm dead.
I tremble at each breath of air and yet can heaviest burdens bear.
Against the sun I protect your eyes and am often worn on the face of spies
I have a little house in which I live all alone. My house has no doors or windows and if I want to go out I must break through the wall.
My voice is tender my waist is slender and I'm often invited to play. Yet wherever I go I must take my bow or else I have nothing to say.
When is it bad luck to see a black cat?