As a child, Lord Hanuman assuming the god sun as a ripe mango, hanuman ji once take trip to catch and eat to this god sun. The god sun was person vied by Rahu (a planet ) known to be central of tamas guna. To save the endless power from Tamas, and to express the message to the world that Satva guna always prevails, God Hanuman goes to take sun in his mouth. God Indra ( the king of swarg) was approached by Rahu with dissatisfaction, who observed this as a confront to his rajas powers, became unconfident, and consequently throw the Vajra (thunderbolt) next to Lord Hanuman, which struck his mouth. He fell back down to the earth and became insensible. Concern Vayu (god of air) went into seclusion, attractive the atmosphere with him. As living beings began to be asphyxiated, Indra withdrew the cause of his thunderbolt, and the Devas invigorated Hanuman and consecrated him with numerous boons. A undeviating spot was left on his chin, explaining his name.
On ascertaining Surya ( god of Sun ) to be an all-knowing teacher, Hanuman raised his body into an route around the sun and requested that Surya agree to him as a student. God Surya refused, claiming that as Hanuman constantly had to be on the move in his chariot, it would be not possible for Hanuman to learn successfully. Undeterred by Surya's negation, Hanuman enlarged his body, placed one leg on the eastern ranges and the other on the western ranges, and with his face turned in the direction of the sun made his request again. Satisfied by his perseverance, Surya accepted his request. Hanuman ji then moved (backwards, to remain facing Surya) constantly with his teacher, and learned all of the latter's knowledge. When Hanuman then requested Surya to extract his "guru-dakshina" (after study the follower give something to his teacher), the latter refused, saying that the happiness of teaching one as devoted as him was the fee in itself. Hanuman ji insisted, as a result of which Surya asked him to help Surya's divine son Sugriva. Hanuman's choice of Surya as his teacher is said to indicate Surya as a Karma Saakshi, a timeless observer of all performance.