Bibbity Bobbity Boo
No symptoms of depression for you!
What would the advantage of that be? Seems like they wouldn’t have incentive to do that.
GP is likely joking; it wouldn't make sense for a magician to deceive a doctor, but the stereotype of magicians working tricks and illusions into random and/or inappropriate situations suggests a type of person that might characterize masking their depression as if doing so is a magic trick.