How do we know Jesus' authority is true?

The authority of Jesus Christ is substantiated through several elements, including His miraculous deeds, authoritative teaching, and His fulfillment of prophecy. In Matthew 28:18, Jesus proclaims that all power has been given to Him in Heaven and on earth. This declaration affirms His divine authority, which is recognized in His ability to forgive sins, heal the sick, and even raise the dead, as seen in Matthew 9:1-8. Additionally, the prophecies about His coming and the nature of His kingdom demonstrate that His authority originates from God, thereby confirming His rightful position as Lord.