Philip Larkin said this quote

You know, I know I should be just as panicky as you about the filthy work - one wants to do nothing in the evenings, certainly not spread rotten books around & dredge for a 'line'. It must be like still being a student, with an essay to do after a week's drinking, only you haven't had the drinking. Quite clearly, to me, you aren't a voluntary worker, from the will: you do it by intuitive flashes, more like an act of creation, & when the flashes don't come, as of course they don't, especially when the excess energy of undergraduate days is gone, then it is a hideous unnatural effort.