註四十二章經 1.259

1.259

佛聞聲悲，將施誨誘，乃詢其在家所為。既對彈琴，故佛因以琴聲急緩喻之。夫修行之人，必使妄念不生、身心虛寂，則自然調適，可得道果矣。

Hearing the mournful voice, the Buddha wished to offer instruction and guidance, so he asked what he used to do when at home. Since he replied that he played the lute, the Buddha used the tightness and slackness of the lute strings as an analogy. Practitioners must ensure that idle thoughts do not arise and that body and mind remain empty and tranquil; then they will naturally be harmonious and attain the fruits of the Way.