In the first verse of the fourth chapter of The Holy Bhagavad Gita (The Song of God), The Blessed Lord (Lord Krishna, Revered Lord Dark Moon) says, 'I taught this indestructible yoga to the Sun in the beginning of creation.' Revealing the Secret p.15
The Blessed Lord said: I instructed this imperishable science of yoga to the sun-god, Vivasvan, and Vivasvan instructed it to Manu, the father of mankind, and Manu in turn instructed it to Iksvaku. Prabhupada translation
Savitri = sun, sun life force, Divine Word, daughter of the Sun, goddess of the supreme Truth who has come down and is born to save
How did the Blessed Lord teach the imperishable science of yoga to the sun-god who in turn taught first man/woman? Sri Aurobindo explains, in his great epic Savitri, how this comes about and how man is shown the way from his mortal state to a divine consciousness and immortal life.
The tale of Satyavan and Savitri is recited in the Mahabharata as a story of conjugal love conquering death. But this legend is, as shown by many features of the human tale, one of the many symbolic myths of the Vedic cycle. Satyavan is the soul carrying the divine truth of being within itself but descended into the grip of death and ignorance; Savitri is the Divine Word, daughter of the Sun, goddess of the supreme Truth who come down and is born to save; Aswapati, the Lord of the Horse, her human father, is the Lord of Tapasya, the concentrated energy of spiritual endeavor that helps us to rise from the mortal to the immortal planes; Dyumatsena, Lord of the Shining Hosts, father of Satyavan is the Divine Mind here fallen blind, losing its celestial kingdom of vision, and through that loss its kingdom of glory. Still this is not a mere allegory, the characters are not personified qualities, but incarnations or emanations of living and conscious Forces with whom we can enter into concrete touch and they take human bodies in order to help man and show him the way from his mortal state to a divine consciousness and immortal life.