Because in speaking a person uses not only his lips and tongue, but also his whole person including his character and degree of refinement; his "words" represent his "heart and mind." Our ancestors affirmed early on that "words are the sounds of the heart," which is certainly an immortal truth.
由於一個人在說話時，並非只用唇舌，而是用他包括人格與修養在內的「全身」或「整個的人」，所以，他的「話」也就代表了他的「心」﹘﹘我們的老祖宗早就肯定了「言為心之聲」，這話的確是不朽的真理。