Disciples must be like their master in every way. They must show love and obedience and experience opposition from those against their message (15:20–21; see 9:1–41; 11:16). Darkness opposes light (1:5). The followers of Jesus carry that light in the world (1 John 1:7; 2:9). They should expect the world to hate them in the way it hated Jesus (see John 17:14). The disciples of Jesus share his separation from and conflict with the world.