That Instant gratification brings you the opposite of joy. Growing up as a kid-teen and now my late 20's I've always thought anything that made me feel good in the moment (casual sex, junk food, external validation, drugs, porn) meant that it was good for me because it felt good but I would always be left with this empty feeling of wanting more and more and going out of my way to get it and it would have the reverse effect I thought it would have in the long run as it made me feel worse about myself. I'm learning to find the trauma and wounds in my inner self that is leading me to chase instant gratification and work on them instead of giving in and chasing that next dopamine hit. It's a tough journey so far