Marcus Aurelius
Meditations 6.2
Let it make no difference to thee whether thou art cold or warm, if thou art doing thy duty; and whether thou art drowsy or satisfied with sleep; and whether ill-spoken of or praised; and whether dying or doing something else. For it is one of the acts of life, this act by which we die; it is sufficient then in this act also to do well what we have in hand.
Marcus Aurelius, Meditations 6.2, translated by George Long
Make no difference in doing thy duty whether thou art shivering or warm, drowsy or sleep-satisfied, defamed or extolled, dying or anything else. For the act of dying too is one of the acts of life. So it is enough in this also to get the work in hand done well.
Marcus Aurelius, Meditations 6.2, translated by C. R. Haines