Thomas Aquinas book Summa Theologica
II–II, 188 <br class="br"> 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. <br class="br">Summa Theologica (1265–1274) <br class="br">Variant: Better to illuminate than merely to shine; to deliver to others contemplated truths than merely to contemplate.