John was an elderly man and their leader. He used this expression to show his love for them. See how you translated this in [1 John 2:1](../02/01.md). Alternate translation: "God, you who are as dear to me as my own children" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Here "the one" refers to the devil. Here "the world" represents the people of the world. Alternate translation: "the devil who is in the people of the world" (See: [[rc://en/ta/man/translate/figs-metonymy]])