What does the Bible say about Jesus' brothers' unbelief?

In John 7:5, it is pointed out that 'neither did his brethren believe in him.' This highlights the tragic reality that those closest to Jesus during His earthly life were skeptical of His identity as the Messiah. Despite witnessing His miracles and knowing His character, they failed to comprehend His divine nature. Their unbelief serves as a sobering reminder of the spiritual blindness that can exist even in familiar relationships, emphasizing the necessity of divine revelation for salvation.