"The only thing that matters is the essence, and the principle of the middle way" is a famous saying from "The Doctrine of the Mean", which means "Only by concentrating on the pursuit of excellence and resolutely implementing the principles of the mean can we achieve perfection."

"Wei Jing Wei Yi" emphasizes the need to strive for excellence and pursue excellence. Only by constantly improving your own level and abilities can you do your best. This requires total concentration on your goals and work, avoiding distractions and wasted energy.

"Yun Zhi Jue Zhong" emphasizes the need to implement unswervingly in the middle way, not to be extreme in doing things, and to avoid going to extremes. When dealing with problems, we must adhere to the golden mean, follow the principles of reasonableness, fairness, and balance, and do not be overly biased in any one aspect, so that we can be fair, reasonable, and effective.

In short, the sentence "Only the best and the best" emphasizes a basic principle of doing things, that is, while pursuing excellence, we must maintain the balance and stability of the golden mean, and do our best. Only when things are organized and planned and don't go to extremes can we achieve better achievements and development.