A word that refers to the feeling of anticipation of new opportunities that one thought previously unreachable

Is there a word that describes the feeling one feels when one breaks down some metaphorical barrier and sees a path to satisfy a desire or develop skill one once thought unsatisfiable or unmasterable?

For example:

After learning to play the piano and mastering his first advanced piece, John felt X as the path to learning his favorite concertos, ones he thought he would never possess the talent to play, presented itself in front of him.

I tried googling around for it but didn’t find much. I’ll also accept a word from a language other than English if it fully captures the meaning.