At any rate when Antisthenes was suffering from a long and incurable illness Diogenes handed him a dagger with these words, “In case you need the aid of a friend.” So convinced was he that there is nothing terrible or grievous in death. But we who have inherited his staff know out of our greater wisdom that death is a calamity. And we say that sickness is even more terrible than death, and cold harder to bear than sickness. For the man who is sick is often tenderly nursed, so that his ill-health is straightway converted into a luxury, especially if he be rich.
Source: The Works of the Emperor Julian, volume II (1913) Loeb Classical Library. Translated by Emily Wilmer Cave Wright.