It is not selfish to think about one's health. No doubt it is undesirable to be thinking about one's illness all the time, to worry about it, or to be too anxious about it; but to care about one's health is the most religious thing there is, because it is the health of body and mind that enable one to do service to God and to one's fellow men, by which one accomplishes one's life's purpose.
— Hazrat Inayat Khan, The Heart of Sufism by H. J. Witteveen, editor