Bruce Lee speaks

"Wishing to cultivate oneself, one first rectifies his heart.

Wishing to recitfy, one seeks to be sincere in his thoughts.

Wishing to be sincere in his thoughts, one first extends to the utmost of his knowledge – such extension of knowledge lies in the investigation of things.

(…)

A kung fu man rests therein, and because he rests, he is at peace. Because he is at peace, he is quiet. One who is at peace and is quiet, no sorrow or harm can enter; therefore his inner power remains whole and his spirit intact.

(…)

Discard all thoughts of reward, all hopes of praise and fears of blame, all awareness of one’s bodily self. And, finally, [close] the avenues of sense perception and let the spirit out, as it will.

The highest skill operates on an unconsciousness level.

(Man’s mind and his behaviour are one)

One does not move ahead but responds to the fitting influence.

The gentleness/firmness is one inseparable force of one unceasing interplay of moment."

- Bruce Lee