[These are things I have heard & from other suffers of Depression. Trust me, these are things that won't evoke a positive response...] I would add: "I think you're upset that I left the house unlocked and the dog in the freezer because your MEDS must be off." My meds must need tweaking a lot then. Asshole.
Try to be, and if that's not possible, appear to be, more empathetic and patient with those suffering from any illness. You'd never tell a person with cancer to "snap out of it," or that "It's just all in your head," OR "you're lazy (or crazy.")