> It's things like relationships, satisfying work, accomplishment. (and many, many more)

Thats absolutely wrong and this is the reason why nothing works and being happy became and endless quest in the western culture.

In the eastern spiritual tradition they found the exact ways of managing body, mind, emotions and energy to reach highest peaks of bliss and ecstasy, and I speak from my own experience, its possible to feel so good that no amount of money, relationships, fame, power, whatever other things you can imagine will make you ever feel.

Because the real thing is happening inside, all the outside things you use to try to provoke inner experience, but it only works for a little bit.

Here its explained in a better way: https://www.youtube.com/watch?v=MY5l0k6BTvc