It is often said that joy is different from happiness. Happiness
is a thing based on “hap” (which means chance), or one based on circumstances
going well — on “good happenings”. By contrast, joy is an abiding sense of fulfillment
and well-being, a disposition not based on circumstances, but one
that is durable in the face of change. Something like that must
be what RZIM spokesperson Max Jeganathan has in mind in this
video, for example.
That distinction's good to note — and true, so far as it goes. But we might press
the issue further: What accounts for the quality of joy that enables it to
endure when mere happiness is taken away from us?