Lean And Sinewy

寧練筋長一寸，不練肉厚三分

Rather train to lengthen the fascias by one inch than to thicken the flesh by one third.

To compare with 外練筋骨皮.

Shining Eyes, Light Hands & Nimble Body

内練精氣神，外練手眼身

Inside essential liquids, vapours  and spirit are trained; outside hands, eyes and body are trained.

The concept of internal and external is a basic of Chinese culture.

Shape, Vapours and Spirit

布形候氣，與神俱往

Deploying the body and awaiting the arrival of vapours, entirely bound for the spirit

布 to spread, to deploy, to disseminate, to dispose, to arrange, cotton cloth

形 form, shape, body

候 to await, to attend, to wait upon, to inquire after, to serve (by extension, in 伺候)

氣 vapours

與 used to introduce 神 the recipient of the action, with, to follow, to assist

神 spirit

俱 all, entirely, without exception

往 in the direction of, towards, bound for, to go

From a basic understanding, such statement can be expanded or modified to decipher even more out of it.

Deciphering Martial Arts Poems

理是功能之本，法是功能之基

Theory is the essence of capability, method its foundation

皆由渡水不知津，登山不識徑*

All because they cross waters without knowing the ford, climb a mountain without the knowledge of the path

As it was already mentioned in Method, old practices favourite method of teaching was through enigmas to be solved by the students, the best ones having more than one level of understanding. Since most of the teaching were done through oral transmission at the beginning, it may be interesting to first have a brief introduction of the oral ones. Still, with the emergence of the boxing manuals, 拳譜, roughly starting at the end of the Ming Dynasty (1368–1644) and the decline of old martial arts practices, the main work nowadays remains in deciphering those texts.

Train, Refine, Temper

練形術

Art of training the body

煉石補天

Refine the stone to repair the innate

千錘百鍊

After hard work and numerous revisions

練, 煉 and 鍊, are all pronounced liàn. They are all made of 柬, to select, but written with different radicals*. They all can be used as to describe one's training. Even if they seem interchangeable, those three characters actually refer to different parts of training in internal arts.