Just before His trials and ultimately death, YAHSHUA spent time alone with His disciples preparing them to face the world without Him and at the same time warning them of things to come, including persecution. After His last supper with them, He washed their feet with the purpose to teach them humility. In chapter 14 He promises to return to earth to gather His own for Himself and blessed them with His peace; He presented Himself as the only Way to the Father, the Truth that will set man free; and Life. He is the only source of life physical and eternal. In chapter 15 He emphasizes sanctification. Here, He presented Himself as the Vine and the believers as the branches. Apart from the Vine there is no life. He calls their attention to love one another, for it is a commandment that summarizes the entire law – love for God and for others. in chapter 16 He promises the Holy Spirit; He details the nature of His ministry; and gives details concerning future persecution coming against them and encourages them to endure, for He had overcome all for them. He concludes it by saying: In the world you will have tribulation and trials and distress and frustration; but be of good cheer! For I have overcome the world (vs. 33).
The tribulation YAHSHUA mentioned was not concerning the great tribulation, as many Christians think, but it referred to persecution from the world which embraces all those who are enemies of God. If you belonged to the world, YAHSHUA said, the world would treat you with affection and would love you as its own. But because you are not of the world, but I have chosen you out of the world, the world hates you. Remember that I told you. A servant is not greater than his master. If they persecuted Me, they will also persecute you (John 15: 19-20a). Persecution is a sign that the believer is not of this world.