"Those with hard temperaments like to win through struggle; they don't like to be defeated. Inferior hard temperaments are explosive and rash, fierce and violent. Soft temperaments are placid and earnest. Inferior soft temperaments are weak-willed and do not seek a thorough understanding of the skills. Tai chi chuan stresses that hardness and softness complement each other. Training teaches one to be hard, but not excessively so, soft, yet not weak. This is to truly absorb the teachings.Those with soft temperaments easily improve. Those with inferior hard temperaments always mistake slowness and lack of force for sluggishness and weakness. Actually, slowness and forcelessness are fundamental aspects of training. Just as steel is produced by applying heat to iron, tempering it, skills of tai chi chuan are refined gradually over a long time."