What was the motivation of Hanuman to serve Lord Rama throughout His life?

[Ms. Geetha Lahari asked: Padanamaskaram Swami, When Hanuman has seen Lord Rama for the first time, how did He conclude that Rama is God and how could He take an unshakeable decision to serve Rama without even caring for His life and happiness? What was His motivation to serve Lord Rama tirelessly throughout His life? At Your divine lotus feet, Geetha Lahari.]

Swami replied:- Rama is the incarnation of God Vishnu. Hanuman is the incarnation of God Shiva. Veda says that God Vishnu and God Shiva are one and the same God Datta. God Shiva recognized God Vishnu and helped Him in the divine program. What is there in this since even a trace of impossibility does not exist.