黄帝使伶伦伐竹于昆豀、斩而作笛,吹作凤鸣。
司马迁 《史记》1

有无相生,难易相成,长短相形,高下相倾,音声相和,前后相随。
Being and Not-being grow out of one another;Difficult and easy complete one another. Long and short test one another;High and low determine one another. Pitch and mode give harmony to one another. Front and back give seque
老子 《道德经》1
Being and Not-being grow out of one another;Difficult and easy complete one another. Long and short test one another;High and low determine one another. Pitch and mode give harmony to one another. Front and back give seque

为无为,事无事,味无味。
老子 《道德经》1

怀柔百神,及河峤岳。
刘安 《淮南子》0

善建者不拔 善抱者不脱
老子 《道德经》1
