A good Judoka never ...

A good Judoka never anticipates his action in a match, but his mind is as clever as a polished mirror which enables him to foresee precisely anything to happen and he displays freedom of his physique to cope with any change. Such mental state and physical action are called sei or tranquility and do or action, sometimes they are called ju and go or tenderness and sturdiness, in and yo or negative and positive, etc.
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 Kyuzo Mifune

Quotes from the same author

The weed crushed and pressed by the heavy rock may slowly and gently grow up anew helped by the fresh air, sunshine, and sympathetic rain. On the other hand, the rock is often broken through exposure to nature and weathering. Life is a strong power to grow in tenderness; this fact may be considered as having a close relation with human life. At the same time tenderness has sometimes stronger power against stiffness or hardening due to extreme strain.
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 Kyuzo Mifune
Do not place hope in finding a secret technique. Polish the mind through ceaseless training; that is the key to effective techniques.
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 Kyuzo Mifune
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.
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 Kyuzo Mifune
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 openmindedness. Gentleness always overcomes strength.
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 Kyuzo Mifune