Respectfully Quoted: A Dictionary of Quotations. 1989.
James Bryce (18381922)
We have seen that the American Constitution has changed, is changing, and by the law of its existence must continue to change, in its substance and practical working even when its words remain the same.
JAMES BRYCE, The American Commonwealth, new ed., vol. 1, chapter 35, p. 401 (1924).