Jesus is speaking to the ones who claim to be the authority on all things spiritual, however, they do not understand what Jesus is saying to them. Jesus is using a figure of speech about Himself. The problem was that the Jewish leaders refused to see Jesus for who He was: the Messiah and the Son of God. Have you ever looked at something and been confused about what you saw until someone explained it to you. This is what the Holy Spirit does for us as believers. He opens our eyes, our minds, and our hearts to see Jesus for who He is as our Savior and Lord. You need to read your Bible everyday, but you also need to pray for the Holy Spirit to illuminate your heart and mind to know Jesus and clearly understand what God’s Word says.
Consider: Romans 11:7-10