Context and Setting:
The event of Jesus teaching at the Feast is recorded in the Gospel of John, specifically in John 7:14-39. This teaching occurs during the Feast of Tabernacles, also known as Sukkot, one of the major Jewish festivals. The Feast of Tabernacles is a time of great celebration and remembrance of God's provision during the Israelites' wilderness wanderings. It is marked by the construction of temporary shelters, or booths, and is a time of communal gathering in Jerusalem.

Scriptural Account:
In John 7:14, it is noted, "About halfway through the feast, Jesus went up to the temple courts and began to teach." This act of teaching in the temple courts is significant, as it places Jesus in the heart of Jewish religious life and tradition. The temple was the center of worship and learning, and Jesus' presence there underscores His authority and mission.

Reaction of the People:
The people were astonished at Jesus' teaching, as recorded in John 7:15: "The Jews were amazed and asked, 'How did this man attain such learning without having studied?'" This question highlights the perception of Jesus as an untrained teacher, yet one who speaks with profound wisdom and authority. His teaching challenges the established religious leaders and provokes a variety of responses from the crowd.

Jesus' Teaching on Authority and Doctrine:
In response to the amazement of the people, Jesus clarifies the source of His teaching in John 7:16-17: "My teaching is not My own," Jesus replied. "It comes from Him who sent Me. If anyone desires to do His will, he will know whether My teaching is from God or whether I speak on My own." Here, Jesus emphasizes that His doctrine is divinely sourced, pointing to His unique relationship with the Father and His role as the Messiah.

Division Among the People:
The teaching of Jesus at the Feast leads to division among the people. Some recognize Him as the Prophet or the Christ, while others doubt and question His origins (John 7:40-43). This division is indicative of the broader response to Jesus' ministry, where His identity and mission are both accepted and rejected.

The Promise of the Holy Spirit:
A pivotal moment in Jesus' teaching at the Feast is His proclamation on the last and greatest day of the festival. In John 7:37-39, Jesus declares, "If anyone is thirsty, let him come to Me and drink. Whoever believes in Me, as the Scripture has said, streams of living water will flow from within him." By this, He refers to the Holy Spirit, whom believers would later receive. This promise of the Spirit is a profound revelation of the new covenant and the transformative power available to those who believe in Him.

Significance in Christian Theology:
Jesus' teaching at the Feast of Tabernacles is rich with theological significance. It underscores His authority as the Son of God, the fulfillment of Old Testament prophecy, and the bringer of the new covenant. His promise of the Holy Spirit points to the future empowerment of the Church and the indwelling presence of God in the lives of believers. This event is a testament to Jesus' role as the living water, the source of spiritual life and sustenance for all who come to Him in faith.