If there are is no specific painting or poem, I believe the answer is beauty.
Answer:
The road of trials is the stage of the hero's journey shown in the passage.
HOPE THIS HELPED!!!!!!!!!!!!!XDDDDDDD
I don't know if it has a completely concrete answer but the sound of a piano is pretty fluid. It can go from peaceful and calm to passionate and emotional depending on the piece. But the most simplistic answer would be words like: Soft, feathery, brassy, etc.