Verse 20

प्राकाश्यममलालोकमालोकस्तेन वर्धते ।मनस्तावद्गुणगतं रसतन्मात्रवेदनम्

In plain words

brightness, stainless light; by that, light increases. Mind, having come to qualities thus far, becomes the sensing of the tanmātra of taste.