I'm not lazy when I've got a short term goal to attend to, and the only other occasion when I found it difficult to work on a long term project was for a few months after my fathr had died. I'm certainly not clinically depressed, since I feel no need to talk to a doctor about it, and I don't suffer from periods of intense gloom, nor do I burst out in floods of tears from time to time, but I do say "but I can't be bothered" more often than I should, and more often than I used to.