Notice that the stiffest tree is most easily cracked, while the bamboo or willow survives by bending with the wind.
As an instructor, you must be able to distinguish between poor performance caused by lack of ability or aptitude on the part of the student and poor performance caused by lack of effort. You should treat the first with patience and the latter with firmness. You must never apply sarcasm and ridicule.
In Jeet Kune Do, it's not how much you have learned, but how much you have absorbed from what you have learned. It is not how much fixed knowledge you can accumulate, but what you can apply livingly that counts. 'Being' is more valued than doing.
The Now is indivisible. Completeness, the now, is an absence of the conscious mind to strive to divide that which is indivisible. For once the completeness of things is taken apart it is no longer complete.