St. Isidore of Seville: "Socrates"

"SOCRATES first established ethics with a view to correcting and regulating conduct, and he devoted all his attention to the discussion of right living, dividing it into the four virtues of the soul, namely prudence, justice, fortitude, and temperance."

~St. Isidore of Seville (c. 560 – 636): Etymologies, 2, 24.

The Death of Socrates, by Jacques-Louis David.

Oil on canvas, 1787; Metropolitan Museum of Art, New York.