瑜伽論記 7.95

7.95

However, where the text states that the eighteen dharmas, such as the eye, visible forms, and visual consciousness elements, are also called elements (dhātu), they are termed elements only by extension and are not the actual substance of an element. Therefore, the text also says that these eighteen dharmas arise and appear from distinct elements, distinct seeds, and distinct gotras. From this one knows that the eighteen dharmas are not the actual substance of an element. Element, seed, and gotra are different in name but identical in substance: they are identically seeds that constitute the substance of the eighteen elements. Now, knowing that the seeds of the eighteen dharmas are distinct is called skill in the elements, which is to attain skill in the identical causal condition (hetu-pratyaya) among the four conditions.