Jesus was praying for His disciples in verse 17 and for all believers in verse 20…. “I do not ask for these only, but also for those who will believe in me through their word.” John 17:20 ESV  He wanted His disciples to be set apart for special service.  He didn’t ask His father to take them out of this world but to keep them from the evil one.  “I do not ask that you take them out of the world, but that you keep them from the evil one.”  John 17:15 ESV  Jesus was about to be arrested, and He was praying for His disciples and you as a believer.  He knew the world would not treat them well because of His word, nor will it treat you well if you are true to His words.  Holiness is the absence of sin, and sin can only be overcome by the word of God.  “I have stored up your word in my heart, that I might not sin against You.” Psalms 119: 11 ESV  God’s word of truth must be established in your life for the working of sanctification.  The word of God is the tool box from which you take needed tools to accomplish this process.  Christian you have been set apart from the world for God’s purpose. You were bought with a price, and you are no longer your own.  Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God?  You are not your own, FOR YOU WERE BOUGHT WITH A PRICE. So glorify God in your body. 1 Corinthians 6:19-20 ESV  His prayer for you was to keep you from the evil one.  May I encourage you to corporate with His prayer.   Do not put yourself in situations that will give place to the evil one.  The evil one desires to destroy you by keeping you from truth and burdening you with worldly thoughts.   Sanctification comes by the truth of the word, and Jesus is the word made flesh.  ( John  Chapter 1)  Do you know Jesus?  If you do, the fact is “You will know the truth, and the truth will set you free” John 8:32. ESV  Free to be sanctified by the word of truth.