The New Testament's three letters attributed to John have always provided remarkable theological riches for the Christian tradition, including the assertion "God is love." Each letter shows how an early Christian author responded to threats against authority by recourse to the correct teachings of the faith and a proper understanding of the relationship between Jesus and God. Together, these letters argue for a bond of unity among believers, based on fidelity to the truth of God.

The New Testament Library offers authoritative commentary on every book and major aspect of the New Testament, as well as classic volumes of scholarship. The commentaries in this series provide fresh translations based on the best available ancient manuscripts, offer critical portrayals of the historical world in which the books were created, pay careful attention to their literary design, and present a theologically perceptive exposition of the text.

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Judith M. Lieu is Lady Margaret's Professor of Divinity at the University of Cambridge in England. She is the author of numerous books on early Christian identity and a former editor of the journal, New Testament Studies.