“In the material world everyone is thinking how they will be happy. In the spiritual world, everyone is thinking how Krishna will be happy.” -Jayapataka Swami.
We’re here to find the highest goal, and our bodies are temporary, so why would that goal be to give ourselves happiness? I’m not saying we shouldn’t try to be happy, I’m simply saying the highest happiness is found in giving happiness to others. If we relate this to the gunas, tamasic happiness is finding joy in hurting others