It's Greek to me, this noun, a feeling of extreme happiness & well-being--it's wonderful!
A feeling of extreme gratification 
aroused by something good or ... it's a joy to hear him  es un gusto orlo, da 
gusto orlo [DOC] [TLE] Joy - definition of joy by The Free Dictionary [PAR] A wonderful feeling enveloped him, as if light were being shaken about him ... be 
on cloud nine, exult, jump for joy, walk on air - feel extreme happiness or elation 
... noun.