Who was the god who taught arjuna about the value of good deeds?

The god who taught Arjuna about the value of good deeds is Lord Krishna. In the Bhagavad Gita, Krishna serves as Arjuna's charioteer and guides him through his moral dilemmas on the battlefield, emphasizing the importance of dharma (duty) and selfless action. He explains that performing one's duty without attachment to the results is essential for spiritual growth and fulfillment.