此所谓：兵无常势，水无常形，运用之妙，存乎一心也。

This so-called: soldiers and volatile situation, the impermanence of water-use essence, is also one Cunhu.

youdao

教学方法的基本要义，是针对教者和被教者的互动而采取的一切贯穿教学过程使之效果最佳化的措施。 教无常态，法无常形，方无穷尽， 运用之妙， 存乎一心，显乎人格，体乎人品。

Aiming at the mutual promotion of students and teachers , the basic idea of teaching method is to use all measures which make the result best in the process of teaching.

youdao