Fairday's Riddle: Hear It Ring?

Hello, Riddlers! Can you guess our theme? It's important to appreciate what this means. ~F  

If you are, no need to ask—nothing left to unmask. To the world you are bound, both feet set upon the ground. You might be put in a bind; silenced by a hateful mind; or left out in the cold, maybe win a pot of gold. You could climb high, just to fall, or be the belle of the ball. You might choose this over that, perhaps you're thin, maybe fat. It's possible you could fly, it's certain that you'll cry. Love and hate, fear and shame; guilt and anger, joy and pain— all these vibes you will know, everyday as you go. Breath in time—feel it all; ups and downs; rise and fall. No matter how things unfold, or which story you've been told, the universal song we sing plays the note our hearts ring.

What note rings? Stop by Friday for the answer

I gave you a clue!