The Aristotelian Society of Marquette University each year invites a scholar to speak on the Philosophy of St. Thomas Aquinas. Those lectures have come to be called the Aquinas Lectures and are customarily delivered on the Sunday nearest March 7, the feast day of the Society's patron saint. For the year 1945, the Society has the pleasure of publishing the lecture by Edward Kennard Rand, Pope Professor of Latin emeritus, Harvard University.