Jesus gave a strong word to the Jewish leaders to show them that there were multiple witnesses to him which should have caused them to believe. He mentions God the Father, John the Baptist, his own works (which were the Father’s works) and finally scripture itself. Jesus said that Moses wrote about him. However, he tells them that since they don’t believe Jesus that indicates they don’t believe Moses either.  

However, the scriptures point us to Christ so how we read the scripture is very important. If our reading or studying is for ethics or morality, we will not receive life. Only by meeting Christ in scripture will we receive eternal life.