How do we know Jesus as the resurrection is true?

The truth of Jesus being the resurrection and the life is substantiated by his resurrection from the dead, which was an event witnessed by many (John 20). In proclaiming 'I am the resurrection,' he asserts his authority and power over death, which he demonstrated through Lazarus's resurrection before his own. This was not merely a rhetorical assertion; it was a revelation of his divine nature. The early Christian church thrived on the truth of Jesus’s resurrection as the cornerstone of their faith, as expressed in passages like Romans 10:9, which affirms that confession of Jesus as Lord and belief in his resurrection is essential for salvation.