Dracula by Bram Stoker Chapter 22 Page 7

No, you must live! You must struggle and strive to live, though death would seem a boon unspeakable. You must fight Death himself, though he come to you in pain or in joy. By the day, or the night, in safety or in peril! On your living soul I charge you that you do not die. Nay, nor think of death, till this great evil be past.”

The poor dear grew white as death, and shook and shivered, as I have seen a quicksand shake and shiver at the incoming of the tide. We were all silent. We could do nothing. At length she grew more calm and turning to him said sweetly, but oh so sorrowfully, as she held out her hand, “I promise you, my dear friend, that if God will let me live, I shall strive to do so. Till, if it may be in His good time, this horror may have passed away from me.”