John 16:31
I have said this to you so that in me you may have peace. In the world you face persecution; but take courage, I have overcome the world — the circle closes: Jesus' entire discourse has aimed at the disciples' peace even in the midst of tribulation. Peace is not the absence of persecution but the presence of Christ, the knowledge that one is upheld by the one who has conquered the world. The word "overcome" (nikaō—to overcome, be victorious; the perfect tense nikēka suggests decisive past victory with ongoing effect) establishes that Jesus' victory over the world's powers is already accomplished. The disciples inherit this victory through union with him.