Judo is the way to the most effective use of both physical and spiritual strength. By training you in attacks and defenses it refines your body and your soul and helps you make the spiritual essence of Judo a part of your very being. In this way you are able to perfect yourself and contribute something of value to the world. This is the final goal of Judo discipline.

As quoted in Dynamic Judo (1967) by Kazuzo Kudo; also in Chasing Dragons : An Introduction to the Martial Arts Film (2006) by David West, p. 10