Sāṅkhya: Categories of the Absolute Truth and the Unfolding of Creation
Tattva-vicāra
रूपमात्राद्विकुर्वाणात्तेजसो दैवचोदितात् । रसमात्रमभूत्तस्मादम्भो जिह्वा रसग्रह: ॥ ४१ ॥
rūpa-mātrād vikurvāṇāt tejaso daiva-coditāt rasa-mātram abhūt tasmād ambho jihvā rasa-grahaḥ
रूप-तन्मात्रा के साथ तेज (अग्नि) के विकार से, दैव-प्रेरणा द्वारा रस-तन्मात्रा उत्पन्न हुई। रस से जल प्रकट हुआ और रस को ग्रहण करने वाली जिह्वा भी प्रकट हुई।
The tongue is described here as the instrument for acquiring knowledge of taste. Because taste is a product of water, there is always saliva on the tongue.
This verse states that from the transformation of the subtle principle of form, fire produces the subtle principle of taste, and from taste, water manifests—along with the tongue as the organ that perceives taste.
Kapila teaches Devahūti Sāṅkhya—an analysis of matter and spirit—so she can understand how the body and senses arise and thereby become detached from misidentifying the self with material elements.
Recognize taste and sensory craving as products of material nature; use the tongue in devotion—through regulated diet and chanting—so the senses become purified rather than dragging the mind into attachment.