[Justin Bieber]

Also, think about this. You can talk to someone about how he/she is feeling and such, and he/she could easily answer "okay" or "alright", and you know something is wrong, but not what. It's obvious to tell from his/her voice that he/she isn't okay at all. So perhaps expressing themselves via talking or writing isn't the best idea. Give them an instrument, play them music to dance to, provide them with materials to create and from that you can get a much better sense of what is wrong. Can sciences do that? Can math do that? I think not.