From
论语·
里仁 (Analects, Book 4): Confucius said
参乎!吾道一以贯之 - 'Shen! My Way is threaded through by a single principle.' When asked by others, Zengzi (
曾子) explained it as
夫子之道,忠恕而已矣 ('the Master's Way is nothing but loyalty and empathy'). One of the most important hermeneutic keys to the Analects.