καὶ τὸ μὲν εὔχεσθαι ἀγαθόν · δεῖ δὲ καὶ αὐτὸν συλλαμβάνοντα τοὺς θεοὺς ἐπικαλεῖσθαι.
Prayer indeed is good, but while calling on the gods a man should himself lend a hand.
—Hippocrates (Regimen, 4.87, trans. W.H.S Jones)
Reading Hippocrates about dreams and how to interpret them in relation to health (for more significant omens, one must have recourse to a dream interpreter): Murky planets lead to foreboding, but clear planets are a sign of health. Any dream requires adjustments to the softness of the bed, the distance and timing of the daily walk, and whether one should run in circles or back and forth, to say nothing of the wateriness of the diet and its color. The details are soporific, as is the heavy fall of snow outside.