Can GRIEF turn into JOY?

you hear these words I will turn their grief into Joy not I will replace their grief with joy that's a different matter there was grief and now there's joy oh and the joy is so great you forget about the grief no that's not what it says as it says I will turn their grief into joy that somehow all the pain in the past not just will be made better and go away but it'll become part of the joy we will see how everything was good all along that's what we're waiting for in other words everything that appeared to be destruction was really part of the rebuilding everything that appeared to be a setback was really progress now we have faith that that is so we have faith but we don't see it yet and we're waiting impatiently for the time mashiach will come and Hashem will reveal to us and we will see it