They may find it for a second, a minute, or a even for a half hour. But the way our brains work is that things get old fast. We become accustomed to what we have and seek more. It is an endless chase and it is on the mistaken track. It even becomes more mistaken when we pursue happiness at the expense of others.
Joy is the quality that remains unshaken and is grounded in the Spirit. I prefer joy to happiness. I see joy as something that abides within the soul, whereas happiness is something that can be dependent on things outside of ourselves. And the joy of the Spirit is as eternal as the Spirit Itself.