The Buddha divides right speech into four components: abstaining from false speech, abstaining from slanderous speech, abstaining from harsh speech, and abstaining from idle chatter. Because the effects of speech are not as immediately evident as those of bodily action, its importance and potential is easily overlooked.
But a little reflection will show that speech and its offshoot, the written word, can have enormous consequences for good or for harm. In fact, whereas for beings such as animals who live at the preverbal level physical action is of dominant concern, for humans immersed in verbal communication speech gains the ascendency.
Speech can break lives, create enemies, and start wars, or it can give wisdom, heal divisions, and create peace. This has always been so, yet in the modern age the positive and negative potentials of speech have been vastly multiplied by the tremendous increase in the means, speed, and range of communications.
The capacity for verbal expression, oral and written, has often been regarded as the distinguishing mark of the human species. From this we can appreciate the need to make this capacity the means to human excellence rather than, as too often has been the case, the sign of human degradation.