You don't go into space just for the science. Economically, it is not worth it. I think the reason we should be in space is for the exploration; it's the human endeavour.

To kill yourself for earning a salary is not worth it.

If you do something that you're not genuinely passionate about, it is a little soul-crushing. Just not worth it.

These $40 burgers with foie gras and truffles and all of that flies in the face of one of the most proletarian foods around. It's overpriced, overdone and just not worth it.

Stay away from drugs. They're not worth it. I've tried, but there's none of them that's worth it.

I think the mental victory is worth it as much as a gold medal.