Emanuel Swedenborg understood the city of New Jerusalem--as described in the book of Revelation--to mean not a physical city but an epoch of history, a new spiritual age that was just beginning to take shape during his lifetime in the eighteenth century.

This short work, presented as a series of teachings that characterize this spiritual age to come, is also one of Swedenborg's most concise and readable summaries of his own theology. Building on fundamental concepts such as good, truth, will, and understanding, he describes the importance of love and usefulness in spiritual growth....