The origin of the expression "enlightening the mind and nourishing the heart" can be traced back to the Chinese spiritual three-character song. There is a line in this poem that "cultivates people with virtue, casts souls with bacon, enlightens wisdom and nourishes the heart", in which the expression "enlightens the wisdom and nourishes the heart" is used.

In addition, "enlightening the mind and nourishing the heart" may also be related to "Farewell to the Ancient Grassland" written by Bai Juyi, a great poet of the Tang Dynasty. According to historical records, when Bai Juyi was serving as Zuo Shiyi in the seventh year of Zhenyuan (791) of Tang Dezong, he left his fellow official Lizhou in Jinzhou and composed this poem in grief. There is a sentence in the poem, "Labor can enlighten wisdom and change can nourish the heart." It may mean that labor can enlighten wisdom, and change can nourish the soul.

Please note that these sources are only possible interpretations, and the exact meaning and use of "enlightening wisdom and nourishing the heart" may require reference to more context and original sources.