I think, to put it simply, depression is the inability to be happy. It could be chemical, but usually at its core it's a constant sadness about something you c

I think, to put it simply, depression is the inability to be happy. It could be chemical, but usually at its core it's a constant sadness about something you cannot, or will not, change. Whether it's for your own self, or for someone else, or just about the state of affairs you witness in the world. Money, friendship, family, a partner, security, a safety net, an optimistic future.. For most depressed people it's a lack of one or more of those things.