The Gospel of John and Its Relation to the Other Gospels.
We learn to believe this when by means of our own spiritual research we see what took place, when we see how our Earth evolution came about by way of Saturn, Sun, and Moon. And when we then find that we can rediscover, independent of all documents, what is presented in the comprehensive words of the John Gospel and in the words of the Luke Gospel, we learn anew to appreciate these documents and to find in them their own evidence that they were written by those who could read in the spiritual world. They provide a means of communication with men of remote times whom we can face, in a sense, and say, We recognize and know you — because what they knew we have found again in Spiritual Science.
Related post: https://martyrion.blogspot.com/2020/03/lesson-19-i-came-forth-from-father-and.html