What am I?

What am I?
Ground or the sky?
Raging storm or calm sea?
Lazy worm or working bee?
Tree’s shadow or scorching heat?
Easy play or challenging feat?
Wild horse or innocent doe?
What am I? I don’t know
Am I
A sour lemon or sweet apple?
Desert cactus or the maple?
Am I the goose or the hawk?
Am I the key or the lock?
Am I darkness or the light?
Am I lowliness or the height?
The evergreen Cyprus or the grass?
The precious gold or the brass?
Am I the pleasant sun or bitter cold?
Am I the warm touch or strangle hold?
Hard diamond or brittle glass?
Low, middle or highest class?
It is a bittersweet irony
That I can’t really see
All I am
Is only me.