For a mountain of nine ren, only one of the achievements falls short:

Nine ren: extremely high; loss: lacking; 篑: a basket filled with earth. A mountain nine feet high cannot be completed without only a basket of soil. It's a metaphor for not finishing something just short of the last bit.

There has been excessive accumulation before, and the last point is missing. As long as there is the last point, qualitative change can be achieved, so it is reflected in the principle of mutual transformation of quality.

Extended information:

The law of mutual transformation of quality:

1. The quality, quantity and measurement of the development of things are the inherent regulations that distinguish one thing from other things. Nature and quantity are the stipulations that the scale, degree, speed, etc. of things can be expressed by quantitative relationships.

The quantity and quality of things are unified, and the unity of quantity and quality is reflected in the degree. Degree is the quantitative limit that maintains the stability of a thing, that is, the limit, amplitude and range of a thing. The two ends of the degree are called joint points or critical points. Beyond the range of the degree, the thing is transformed into something else.

The difference between quantitative change and qualitative change depends on whether it exceeds the "degree". The philosophical category of degree inspires us to master the principle of moderation when understanding and dealing with problems. ?

Quantitative change is the increase or decrease in the quantity of things and the change in the arrangement of the constituent elements. It is an insignificant change that maintains the relative stability of the quality of things, and reflects the continuity of the gradual development process of things. Qualitative change is a fundamental change in the nature of things. It is a leap from one qualitative state to another. It embodies the gradual process of development of things and the interruption of continuity. ?

2. The relationship between qualitative change and quantitative change The dialectical relationship between quantitative change and qualitative change is:

First, quantitative change is a necessary preparation for qualitative change. The change of anything has a process of accumulation of quantitative changes. Without the accumulation of quantitative changes, qualitative changes will not occur.

Second, qualitative change is the inevitable result of quantitative change. Pure quantitative changes will not last forever. Quantitative changes will inevitably lead to qualitative changes when they reach a certain level.

Third, quantitative change and qualitative change are interpenetrated. On the one hand, there are staged and partial partial qualitative changes in the overall quantitative change process; on the other hand, in the qualitative change process, there is also the quantitative contraction of the old quality and the quantitative expansion of the new quality.

Quantitative change and qualitative change are interdependent and interconnected. Quantitative change causes qualitative change. On the basis of new quality, things begin to undergo new quantitative changes. This alternate cycle forms the law of mutual change of quality of things. The law of mutual transformation of quality reflects the unity of gradualness and leap in the development of things.