Their victory over the wicked one consists in the rejection of all that he offers them, summed up as ‘the world’. His strategy was unmasked when he was forced to play his strongest card in tempting the Lord of glory, but Christ refused all the kingdoms of the world and the glory of them and so overcame him.
Though we are given all things richly to enjoy, we are aware that the world tries to draw us back little by little, and therefore we must ration how much we take of even legitimate pleasures. We must make sure that we do not depend on them for security and comfort that can only come from the Lord.
Why does John tell us not to love the world, when in verse 2 he teaches that Christ is the propitiation for the sins of the whole world? Scripture uses the word ‘world’ in different senses. In verse 2 John refers to the people living in the world, but here he refers to the world as a spiritual kingdom at war with God and hostile to faith.