Okay, so number one, depression — not the emotion, the clinical condition — is a real and serious disease. This meme is no different than advocating “eating clean” over chemotherapy for someone who has cancer, or advocating letting your children “acquire immunity” to Polio by letting them get Polio. It’s irresponsible in the extreme, and contributes to the social belittling of people with mental illness. While a mental illness is literally “all in your head” (as in physically), it’s not imaginary and can’t be wished away through the power of positive thinking.

Deep breaths.