George Orwell, in his 'As I Please' column in 'Tribune' for 3rd January 1947, wrote
FROM The Thoughts of the Emperor Marcus Aurelius:
"In the morning when thou risest unwillingly, let this thought be present—I am rising to the work of a human being. Why then am I dissatisfied if I am going to do the things for which I exist and for which I was brought into the world? Or have I been made for this, to lie in the bed-clothes and keep myself warm?—But this is more pleasant—Dost thou exist then to take thy pleasure, and not at all for action or exertion? Dost thou not see the little plants, the little birds, the ants, the spiders, the bees working together to put in order their several parts of the universe? And art thou unwilling to do the work of a human being, and dost thou not make haste to do that which is according to thy nature?"
It is a good plan to print this well-known exhortation in large letters and hang it on the wall opposite your bed. And if that fails, as I am told it sometimes does, another good plan is to buy the loudest alarm clock you can get and place it in such a position that you have to get out of bed and go round several pieces of furniture in order to silence it.
