A careful physician . . ., before he attempts to administer a remedy to his patient, must investigate not only the malady of the man he wishes to cure, but also his habits when in health, and his physical constitution.
Source: On the Orator, II.
-- Marcus Tullius Cicero, (Jan 3 106BC-3BC), Roman statesman, scholar, orator; He introduced Greek philosophy to ancient Rome; wrote De Republica.