Therefore although he frequently describes the inexpressible but nevertheless existent Way, as early as his second chapter he connects it with the experiential world. "When everyone knows what makes beauty beautiful, they also know what is ugly. When everyone knows what makes goodness good, they also know what is evil.
因此他雖不時描述那不可言說、卻又存在的「道」，老子書第二章卻立刻與經驗世界應合，「天下皆知美之為美，斯惡矣；皆知善之為善，斯不善已。