While you didn't really provide us with any possible goals which one might consider to be least or most realistic - What one shouldn't do if one wants to attain mental and emotional health is to set up healthy and achievable goals, that one doesn't expect too much from himself or that one can be able to say no to a request etc.
Answer:
Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make choices.
Explanation:
I would say feelings of worthlessness. You can't really see it on their body, but they can tell you if they choose to, so that makes it hidden in my opinion.
I hope that helps!
