NOTES for Joh 14:27
Speaking about peace that is not of this world, Jesus calls His disciples not to be afraid. The matter, of course, concerns peace in the sense in which this word is used in Yahwism and Judaism, and afterward came to be used by Christians as well: peace as God's presence, or more precisely, as the effect of God's presence on human nature, which evokes in a person the sense of inner peace and rest. But the main thing is not the sensations, but the Presence itself. It was, of course, familiar to those who sought God even before Christ's coming, especially to the Yahwists, for God never abandoned His people.
But complete deliverance from fear had never happened. Even those who seemed to stand firmly on the path of righteousness experienced fear. This is understandable: righteousness does not belong to human nature by nature. It is not a property or quality of fallen humanity; it is only a state in which one can remain, but which one can easily lose. In essence, the fallen human being is righteous in spite of his nature. In any case he has to oppose the evil and sin he carries within himself. This means that fears too can find a place in the life of a righteous person. Until human nature is transformed fully and to the end, they cannot be finally eliminated.
One can only make it so that they do not determine the course of spiritual life and life in general. But with the coming of Christ the situation changed, for with Him the Kingdom entered the world. This means the possibility of that very complete and final transfiguration of human nature also entered, and correspondingly deliverance from all fears connected with the fall, including the fear of death and the fear of what people consider supernatural, the two main fears of modern humanity. In the Kingdom there are no fears, and Jesus calls His disciples precisely there, after Himself.