LH part 2
it is certainly true that we have no record of Jesus itemizing the unfolding of his mission as far as scripture writing was concerned.
however we do have record of him commissioning the apostles to bear witness to him.matthew 28v19f.acts 1 v 8.
he promised that the Holy Spirit would teach them what they could not handle then john 16 v 12-14,and that the Spirit would bring to their memory what he had been teaching them while present with them .john claimed that what he wrote was their testimony of their time with Jesus.1 john 1 v 1-4.his purpose in writing was to advance belief in Christ.john 20 v 30f.