Read: John 21:24-25
The purpose of John writing his gospel is found in John 20:29-30 where John states that he wrote the gospel so that its reader might believe in the name of Jesus. Here, in the last two verses John makes two final remarks concerning the veracity of the testimony that he had just written down. First, John says that the disciples testified and wrote these things, and that “we” know that his testimony is true. This seems to be a peculiar statement in some ways in that a John is self-validating. In other words, he’s saying that his statement is true because he said so. But rather than this, John is probably appealing to what others have said concerning Jesus as a witness of Jesus. When John says that they know his testimony to be true, he’s saying if you don’t believe him, just ask others. Second, John says that there were numerous other things that Jesus did that are not recorded. He supposes that there are not enough books in the world to contain all that Jesus did. John in a way then is only a highlights reel of what Jesus did. He’s just scratching the surface, as there are details that are not recorded concerning Jesus life. His hope is that what he has shown is sufficient to convince his readers to believe.
The eyewitnesses to Jesus have all passed away, but they did not leave their spiritual progeny empty handed concerning the works of Jesus. A few of them recorded what they saw themselves (as in parts of Matthew and John), and others reported it so that those collating these source could record it as in other parts of Matthew and the books of Mark and Luke. But the gospels are not the only records. In the Bible, there are the four gospels, Acts, and numerous letters by Paul, John, James, Peter, and the writer of Hebrews that all testify to Jesus and what he did. Outside the Bible are historians that account for Jesus as well. The biblical and extrabiblical accounts are corroborated with political history, social history and archaeology among other sources.
Skeptics today like to illustrate two problems they see with the Bible: the reliability of the documents that exist concerning the Bible and the historical accuracy. The Old Testament as delivered to the world today came by way of the work of the Masoretes. They meticulously copied the texts with a great deal of accuracy and attention to detail. When the Dead Sea Scrolls were found and compared to the Masoretic texts, the Dead Sea scrolls vindicated the reputation of the Masoretes reputation as the scrolls were almost exactly the same as the much later Hebrew texts available before the discovery of the Dead Sea Scrolls. The New Testament is a different story in that there are over 5000 documents that make up the body of available texts, making it the most well preserved ancient document known to exist. From these available texts, scholars have been able to produce what they believe to be an accurate representation of the original manuscripts through careful study of the texts. The historical reliability of both Old Testament and the New Testament are vindicated in a number of ways. First, the writers themselves do not seem to be reporting what they witnessed about Jesus as something that was fictional, rather they believed what they were reporting was true. They paid attention to details concerning people, places, and events such that the events of Jesus’ unfolded in the context of real history. Second, and in part of the attention to details, the history of the Bible is corroborated by archaeology. And third, as mentioned, the extrabiblical evidence, and social history, and political history vindicate this as well.
The witness of John is a part of the whole of the testimony concerning Jesus. At the end of the book, John wants to make known the way of salvation and way to abundant life that can only be found in Jesus. Christians today have this testimony in hand and can use to understand the way of salvation and also give it to others to use so they too can have eternal life that is only found in Jesus. Jesus is the light of the world, the way, the truth, and the life, the good shepherd, the bread of life, the source of living water, the lamb of God, the savior of the world, and ultimately God himself! Believe in Jesus and be saved!
Lord, your truth is revealed! Help all to know it and believe!