Not of the World

Where does Jesus draw a clear line?
Between those who belong to the sinful world, led by the "evil one" (John 17:15) - i.e., Satan, and those who follow Jesus and are "not of the world" (John 17:14, 16).

Does Jesus want His followers to isolate themselves from the world?
"I do not pray that You should take them out of the world" (John 17:15). Jesus is arming His followers with the Gospel and commissioning them to invade the sinful world to save sinners out of Satan's grip. What he wants isn't for His followers to be taken out of the world, but for the world to be taken out of His followers.

How will God the Father "keep them from the evil one" (John 17:15)?
No true follower of Christ will surrender to Satan and go over to his side.

Will the world love or hate Jesus' followers?
 

Does the world love you or hate you?
 

Does the world even know that you belong not to it but to Jesus?
 

Why does Jesus say that He sanctifies Himself in John 17:19?
αγιαζω (hagiazo), the original Greek word translated “sanctify,” can mean either "to purify or make holy," or "to set apart for service to deity.” By praying, "And for their sakes I sanctify Myself" (John 17:19), Jesus wasn't saying that He, who is already sinless and holy, needs to be purified or made holy, but that He sets Himself apart for service to the Father - i.e., death on the cross.

How will His followers be sanctified - i.e., kept purified from the world?
“Sanctify them by Your truth. Your word is truth" (John 17:15), hence our need to constantly bathe and fill our mind, heart and soul with the word of God.