How do we know that Christ's teachings are the ultimate truth?

The authority of Christ's teachings is established in the Scriptures, where He explicitly claims the divine origin of His doctrine. In John 7:16, Jesus states, 'My doctrine is not mine, but his that sent me.' This declaration points to the source of His teachings, affirming that they are divinely inspired. The consistent fulfillment of Old Testament prophecies through Christ's life, death, and resurrection further affirms the truth of His doctrine. Furthermore, the experience of believers who have encountered the life-transforming power of the gospel serves as a testament to its truth. As sinners are redeemed and regenerated through the preaching of Christ, they bear witness to the ultimate truth found in Him, which leads to salvation and eternal life.