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Ut est rerum omnium magister usus (roughly "experience is the teacher of all things" or more generally "experience is the best teacher") is a quote attributed to Julius Caesar in De Bello Civili, the war commentaries of the Civil War. Since then the phrase has become a common saying regarding learning and leadership.
Commentary
John C. Maxwell stated that the only way of learning from personal experiences is to reflect on them, something he feels Caesar had done a lot of, which was the only way he was able to become successful and write down his thoughts.
Michael Ekow Manuel; Maritime Risk and Organizational Learning. Ashgate Publishing, Ltd., 2012. ISBN9781409486718 - page: 59
Stuart Berg Flexner; Wise Words and Wives' Tales: The Origins, Meanings and Time-honored Wisdom of Proverbs and Folk Sayings, Olde and New. Avon Books, 1993. ISBN9780380762385 - page: 2
John C. Maxwell; The 15 Invaluable Laws of Growth: Live Them and Reach Your Potential. Hachette UK, 2012. ISBN9781455518210
Thomas G. Reid; Sustained Leadership WBS: A Disciplined Project Approach to Building You and Your Team into Better Leaders. Morgan James Publishing, 2017. ISBN9781683505945
