瑜伽師地論略纂 2.43

2.43

工巧中，「但為戲樂」等者，餘處說此實通三性，今但簡染，相難知故。謂為戲樂，貪、掉等生。「不為活命」。習業、簡擇故。此戲樂工巧，染污；活命、習業，體實無記；簡擇是善，善心慧等，簡擇生故。

Under crafts, "merely for entertainment and pleasure" and so forth: in other places it is said that this actually extends to the three natures, but here it only selects out the defiled, because the characteristics are difficult to discern. That is, if for entertainment and pleasure, greed, restlessness, and so forth arise. "Not for livelihood": because it is for practicing skills and selective discernment. These crafts for entertainment and pleasure are defiled; for livelihood and practicing skills, their entities are actually neutral (avyākṛta); selective discernment is wholesome, because wholesome mind, prajñā, and so forth arise through selective discernment.