Vac (Sanskrit: वाच्, vāc) is a Vedic goddess who is a personified form of divine speech.
She enters into the inspired poets and visionaries, gives expression and energy to those she loves; she is called the "mother of the Vedas" and consort of Prajapati, the Vedic embodiment of mind.
[2] Elsewhere, such as in the Padma Purana, she is stated to be the wife of Vision (Kashyapa), the mother of Emotions, and the friend of Musicians (Gandharva).
[2] She is identified with goddess Saraswati in later Vedic literature and post-Vedic texts of Hindu traditions.
Thomas McEvilley gives goddess Vac and the area of her divine purview treatment in 'Appendix E: Philosophy and Grammar' to his magnum opus The Shape of Ancient Thought.