How do we know that Jesus' testimony is true?

The truth of Jesus' testimony is established in His fulfillment of numerous prophecies found in the Old Testament. He is described as the one who testifies to God’s everlasting covenant and the promise of salvation. Additionally, His resurrection from the dead serves as the ultimate confirmation of His truthfulness and authority, echoing the realities He proclaimed during His ministry. As the Son of God, His witness carries unparalleled weight as it is grounded in divine knowledge and experience, affirming that He was sent by the Father and speaks what He has seen and heard (John 3:34).