18 July 1870 Posted on July 18, 2016 by Staff The First Vatican Council decrees the principle of papal infallibility. Famous Words of Inspiration..."It's not the events of our lives that shape us, but our beliefs as to what those events mean." Tony Robbins — Click here for more from Tony Robbins Related posts: 18 July 1870 1 November 1950 18 September 1870 30 March 1870 28 July 1984 4 July 1569 6 October 1723 18 July 1984 15 June 1752 18 July 1955