How do we know that Jesus is the fulfillment of Isaiah 53?

The New Testament emphasizes that Jesus Christ fulfills the prophecies laid out in Isaiah 53. The evangelist Philip, as recorded in Acts 8, uses this passage to explain Jesus' identity to the eunuch, asserting that Jesus is indeed the suffering servant foretold. Throughout his ministry, Jesus embodied the characteristics described in Isaiah—he was rejected by his own people and suffered extensively, culminating in his sacrificial death. The miracles and teachings of Jesus also substantiate his role as the Messiah, confirming that he was the one prophesied to bear the sins of many.