Whatever happens

If I feel sad, I just close my eyes and tell my self "what's the difference between sadness & happiness? They are just feelings, so i can choose, somehow, what i want" this may fix right?
Psychologically, feelings actually are nothing but a different kinds of enzymes which are motivated by our brains according to some situations or manners.
sorry of this crazy way, but if u feel sad, try to: laugh aloud .... :*