Ok. I will elaborate in another way since you did not find the ''connection''. But I feel I am answering something on Karma(cause and effect)
. I will make it simple.
When we used these two type of fajin, we apply 4oz of Jin to emit the partner 1000lb
For ''bow & arrrow' we used Medium Frame.(knees and elbow)
For Dantian fajin we used Small Frame.
The other type is for Large Frame, we used ''whole body Jin'' or the ''Six Harmony Jin'' similar to Chen taichi and other IMA like Bagua Zhang (which I do) and Xingyi. Six Harmony requires more movements involving hands, feet, body.
Seldom it can be fully explained in writing(unless one is very good in written expression). I am sure most of the members are aware but we do our best in forums like this. It is reasonable that some connect and some don't. Which is why I like to read more and learn how to express it better so that more can ''get it''
With more forums and postings, we are getting there.
I have read your other postings here and I believe you are teaching or training similar taichi. Maybe you could tell us how you connect to this particular aphorism for our understanding.
Last but not least, the ''gems'' are for each individual to unearth and to have, therefore no need to steal.