You must hurry. Not just because you get closer to death each day, but because your ability to think clearly is fading too. The part of your mind that helps you understand what things really are — and guides your actions based on that understanding — gets weaker every day. It might give out before you even die.
Thou must hasten therefore; not only because thou art every day nearer unto death than other, but also because that intellective faculty in thee, whereby thou art enabled to know the true nature of things, and to order all thy actions by that knowledge, doth daily waste and decay: or, may fail thee before thou die.