"I have said these things to you, that in me you may have peace. In the world you will have tribulation. But take heart; I have overcome the world.” John 16:33
Jesus tells us we can have peace(to rest) in him even though we will encounter tribulation(suffering resulting from oppression or persecution) because he has overcome(won and conquered) the world by perfectly fulfilling everything that was required of him. He conquered death by living a life of perfection, something we could never have done, giving us life. It is through him that we can get courage and strength to win the numerous and difficult battles that we encounter daily. It is through him that we can have (real) peace when loved ones are lost or when things are not going as we wanted them to go.
Our biggest enemy, death and sin, has been conquered by one who loved and chose us from the very beginning.
I love this verse because it encourages me not to be afraid of what will come, reminding me to trust in what Jesus has done. Jesus said it would not be easy to follow him, but because of what he did following him is worth everything.
So be encouraged, take comfort, and be courageous, because Jesus has overcome the world!!