The mind, if slackened even a little, will cause defeat, the same as fearing the opponent will make you unable to use full strength.
Kyuzo MifuneA chance to try your technique is in one instant never to be regained, so try it without hesitation.
Kyuzo MifuneA 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.
Kyuzo Mifune