Q. Where does the quotation "wise restraints that make men free” come from?

John MacArthur Maguire, LL.B. Harvard 1911, Professor of Law 1923-57, Royall Professor of Law 1950-57, composed this declaration, which has been used by Harvard Presidents when conferring degrees at Commencement since the late 1930s: "You are ready to aid in the shaping and application of those wise restraints that make men free."  The quotation is enshrined on a plaque that hangs in the Harvard Law School Library’s main stairwell in Langdell Hall.