What does "hard cannot last, soft cannot be maintained" mean?

Strength cannot last long: Masculinity alone cannot last long.

Soft and undefendable: It is difficult to defend with feminine energy alone.

It refers to the need to balance hardness and softness when fighting or fighting with others. Being upright and stubborn cannot last too long, and being weak cannot hold on to the fundamentals. On the surface, it talks about martial arts skills, but actually it talks about the principles of life.

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Extended information:

This sentence is from Jin Yong's original "The Legend of the Condor Heroes" Chapter 18 " "Three Test Questions", the original text is as follows:

At this time, Guo Jing only heard that Ouyang Fengchu was about to overwhelm Huang Yaoshi with thunderous momentum. The sound of the flute dodges here and there, but as long as there is a slight gap in the sound of the zheng, it will come out immediately. After a while, the sound of the zither gradually slowed down, but the sound of the flute became more and more soul-stirring. Guo Jing suddenly thought of two sentences from the "Kong Ming Fist" formula that Zhou Botong taught him to recite: "Hardness cannot last, softness cannot be maintained." He thought to himself: "The sound of the zheng will surely counterattack. "Sure enough, as soon as the jade flute was blown to the sound of Qingyu, suddenly there was a loud clanking sound, and the iron zheng regained its majesty.

Although Guo Jing was familiar with the boxing formula, his understanding was low, and Zhou Botong was not good at explaining it. He could not understand even 10% of its meaning. At this time, he listened to Huang Yaoshi and Ouyang Feng saying: The sound of music competing, both sides attacking and retreating, seemed to coincide with the boxing techniques he was familiar with. He didn't understand what he originally knew, but after several fights between the two types of music, he gradually realized some of the key points, and he couldn't help but secretly like it.

/www.baidu.com/link?url=q4wtPhVk_fUMYlgSb3ukbaRL4ZKTl14_CSgP-c8m6yCHNLfVEEPxYpZQxxcgx5-dlbfps6I1I5KXqfHeSz69CBIkenCvgp17Tf9VBXJFBViTdCwl6CMgcIKnNX7tE 2jSSaI7IrwHCi3QupEq_pnoyaamp;wd=amp;eqid=ac7007a800389abf000000035d3161b6"target="_blank"title="Only supports selecting one link to take effect"gt; Baidu Encyclopedia-The Legend of the Condor Heroes