Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Chi Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao su, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching Those who know do not speak. Those who speak do not know. - Lao Tsu, Tao Teh Ching