
II–II, 188
Original Latin http://www.corpusthomisticum.org/sth3183.html: Sicut enim maius est illuminare quam lucere solum, ita maius est contemplata aliis tradere quam solum contemplari.
Summa Theologica (1265–1274)
Variant: Better to illuminate than merely to shine; to deliver to others contemplated truths than merely to contemplate.