Rick Doblin, MSPS president and founder, believes the drug could help people with post-traumatic stress because it enabled them to "let go of fear" and emotionally work through an upsetting experience.

BBC: Ecstasy

But I'm going to do my best to give her a mental Xanax and try to let go of the fear.

WSJ: The Price of Being Too Thrifty

It's this ability to attack problems as a beginner, to let go of all preconceptions and fear of failure, that's the key to creativity.

WSJ: Jonah Lehrer on How to Be Creative