No Hope of the World Getting Better

They were not to hope that the world would improve, nor did He give the least intimation of its getting better. He had already, in chapter 12, pronounced it under judgment: "Now is the judgment of this world," and here He prepares His own to receive hatred from it.
As to the Holy Spirit, He said, "The world cannot receive [Him ], because it seeth Him not, neither knoweth Him." Ch. 14:17.
As to Himself, the world would see Him no more. We know it has not, nor will it see Him till He comes in flaming fire to put all enemies under His feet.
As to themselves, they were to have tribulation in it, and hatred, and persecution from it. He said, "If the world hate you, ye know that it hated Me before it hated you. If ye were of the world, the world would love his own; but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you." Ch. 15:18, 19.
At the same time they were to know peace in Him and to be of good cheer, not because the world would get better, but because He had overcome the world. Their true hope was that He would come again, and then their sorrow would be turned into joy.
It is scarcely possible that anything can be more clearly taught than that the Christian's position here is one of distinct and practical separation from the world, because he is associated with Christ whom the world has rejected, and still hates. He is here looked at, though in the world, as not of the world, but a sufferer from it, a minister of blessing to it, and going through it glorifying God. He hopes for Christ to come and take him out of it to the Father's house. (See John 14:17, 30; 15:18-20; 16:22, 33.)