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
Когда теджас (огонь), взаимодействуя с тонким началом формы, претерпевает изменение по высшему устроению, возникает тонкое начало вкуса. Из вкуса проявляется вода, и также возникает язык, воспринимающий вкус.
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.