Ju means being natural or in other words the way which is natural and in accords with the truth of the universe and the one that human beings have to follow. Also, Ju may mean anything reasonable, just and honorable, accordingly noble: namely the realization of Truth , Good and Beauty.
This lofty spirit of Judo is in its pure and firm trait, for its principle can only be grasped by continual self-annihilating efforts and endeavor, or in other words, through continuous hard exercise in sweltering summer and rigorous cold winter. Judo training is attainable only by dint of endeavor, perseverance, and modesty besides physical exercise.
The mind, if slackened even a little, will cause defeat, the same as fearing the opponent will make you unable to use full strength.
True spirit of Judo is nothing but the gentle and diligent free spirit. Judo rests on flexible action of mind and body. The word flexible however never means weakness but something more like adaptability and open-mindedness. Gentleness always overcomes strength.
