The magical words “Learning by doing” means a lot for the reality of life. I think, “Just do it,” by Nike is a modern version of the expression. The inventor of the original expression is John Dewey (1859–1952) an American philosopher, psychologist, and educational reformer.
For Dewey, it was vitally important that education should not be the teaching of mere dead fact, but that the skills and knowledge which students learned be integrated fully into their lives as persons, citizens and human beings. This practical element—learning by doing. Wikipedia.org