The Riddle

I am as yet unknown

I am that which weeps

Then laughs

I have been the spring

And then the winter

I am old

Though I haven’t lived long

I am a creator and destroyer

Though the world is not mine

I have yet to be a story

Though I have been a song

I am that which soars

Though you see me plummet

What am I?

Who am I?

 

Please write the answer below.