Read: John 16:33 “I have said these things to you, that in me you may have peace. In the world you will have great tribulations. But take heart; I have overcome the world.”
Here Jesus is trying to reassure the disciples because He’s told them that He going to be arrested, suffer, and die on the cross and then He is going to return to the Father in heaven. The disciples had no peace about this so Jesus “said these things to” them so that they would “have peace” because the world offers only suffering and trials, but Jesus says to them, and to us, “take heart; I have overcome the world.” That means we can overcome the world too by believing in Him. Have you?