Being in the same situation you are, I understand how careful you have to be with words. My difficult child wanted to join the Peace Corps, unfortunately, they require at least a bachelors degree.
I tell him he can still work for Habitat for Humanity or Save the Children or something like that, but once they get fixated - well, you know.
I would stick with the "I hope your plans work out one day", maybe he will find his niche somewhere else.
