An instructor should exemplify the things he seeks to teach. It will be of great advantage if you yourself can do all you ask of your students and more.
Bruce LeeWhen one has reached maturity in this art, one will have the formless form. It is like the dissolving or thawing [of] ice into water that can shape itself to any structure. When one has no form, one can be all forms; when one has no style, one can fit in with any style.
Bruce Lee