Stevie Smith said this quote

These thoughts are depressing I know. They are depressing, I wish I was more cheerful, it is more pleasant,Also it is a duty, we should smile as well as submitting To the purpose of One Above who is experimentingWith various mixtures of human character which goes best, All is interesting for him it is exciting, but not for us. There I go again. Smile, smile, and get some work to doThen you will be practically unconscious without positively having to go.