大方廣圓覺修多羅了義經略疏 2.919

2.919

帶病修行，故增諸病。反此而言，則稱實修行唯益實德。如藥草等種有甘苦，水土所滋，各唯增益。苦喻我相為本，甘喻淨覺為本，水土則喻萬行。

Practicing while carrying disease, they therefore increase their diseases. Stated conversely, practicing in accordance with reality only increases real virtues. Just as medicinal herbs and the like have seeds that are sweet or bitter, what is nourished by water and soil only increases each [according to its nature]. Bitterness is an analogy for taking the mark of a self as the basis; sweetness is an analogy for taking pure enlightenment as the basis; water and soil are an analogy for the myriad practices.