John 15:18-27  Jesus goes from talking about love - to talking about hate.  The world will hate the follower of Jesus, just like they hated Him.

He explains it this way:
The world loves those who are its own.
The disciples are not "of the world". 
They were chosen "out of the world". 
Therefore the world hates them.

The hatred will be expressed by persecution.
The hatred is shared - the enemy hates the Father and the Son, and the believer who belongs to God.
They hate Jesus because He has exposed their sin.  He exposed the fact that they did not know God and did not love Him.
They hate Jesus because they have no excuse for their unbelief.  He gave them every opportunity to believe - the works He did, right before their eyes, was all the proof needed for them to believe and be saved.
They hated Him without cause... just as He knew they would.

Again, Jesus promises that the Holy Spirit, the Spirit of truth, would come from the Father.. bearing witness of Him and making them able to also be His witnesses.

Chapter 16 - So don't stumble! When they kick you out of the synagogue.. when they hate you.. and when they even kill you..  remember!

They did it to Jesus first.
It will happen to His followers too.
Don't stumble.
Stay in the Vine and not in the world.

Father in heaven,  fill us with the Spirit of truth, Your Holy Spirit, who is our Helper.  Fill our hearts and minds with the Word of Life and help us to stay abiding in Christ.  May be bear fruit, especially the fruit of love.. to glorify Your Name and to  bear witness of our relationship to You through Jesus Christ our Savior.  Asking in His Name... the Wonderful Name of our Lord, amen.