The bottom line is: they have to find it for themselves.

My adult daughter has been suffering with anxiety and depression, and she would blow through therapists and psychiatrists--until she wanted to drive and had panic attacks behind the wheel. No amount of cajoling on my or my husband's part would help. She's now doing her own therapist and psychiatrist out of her own pocket.

It's really hard to see your adult child fall apart and get into trouble, but sometimes they need that "oh, crap" moment to realize they need help. And then they have to learn on their own what you've been telling them all along.