I spent every night until four in the morning on my dissertation until I came to the point when I could not write another word not even the next letter. I went to bed. Eight o'clock the next morning I was up writing again.
Get up tomorrow early in the morning and earlier than you did today and do the best that you can. Always stay near me for tomorrow I will have much to do and more than I ever had and tomorrow blood will leave my body above the breast.