Peter Brand Posted over 2 years ago If you could teach the world 1 valuable thing you learned, what would it be and why? Do not be so deluded as to imagine that other people are responsible for your emotional well-being. This means people/things can't *make* you happy; only you can. Nothing makes you sad; you decide to do that. Sadness and anger may be appropriate, just realize that it is your choice to feel that way. And you can change your choices.