“A physician who treats himself has a fool for a patient.”

The Other World (1657)
Context: The most competent physician of our world advises the patient to listen to an ignorant doctor who the patient thinks is very competent rather than to a competent doctor who the patient thinks is ignorant. He reason is that our imagination works for our good health, and as long as it is supplemented by remedies, it is capable of healing us. But the most powerful remedies are too weak when the imagination does not apply them.

New York State Journal of Medicine, review of Understanding the Alcoholic's Mind.

Source: Short fiction, Dragonfield and Other Stories (1985), The Bull & the Crowth (p. 122)

Ὁ βίος βραχὺς, ἡ δὲ τέχνη μακρὴ, ὁ δὲ καιρὸς ὀξὺς, ἡ δὲ πεῖρα σφαλερὴ, ἡ δὲ κρίσις χαλεπή. Δεῖ δὲ οὐ μόνον ἑωυτὸν παρέχειν τὰ δέοντα ποιεῦντα, ἀλλὰ καὶ τὸν νοσέοντα, καὶ τοὺς παρεόντας, καὶ τὰ ἔξωθεν.
1:1, Variant translation: Art is long; life is short; opportunity is fleeting; judgement is difficult; experience is deceitful. Compare: "The lyfe so short, the craft so long to lerne", Geoffrey Chaucer, The Assembly of Fowles, line 1.
Aphorisms

Source: House Calls: How we can all heal the world one visit at a time (1998), p. xi

This was in reply to to Gandhiji’s refusal to take medicine as it was not made in India in page=94
Remembering Our Leaders: Mahadeo Govind Ranade by Pravina Bhim Sain

After the Funeral (1953)

Source: Epigrams, p. 345