A 19th-century evangelist offers powerful meditations on I Corinthians 13, St. Paul's famous chapter on love. Revered by religious and secular readers alike, this well-known discourse is accompanied by additional brief essays, including: Pax Vobiscum, The Changed Life, "First!", How to Learn, What Is a Christian?, and The Study of the Bible.

Scottish evangelist Henry Drummond (1851?97) wrote Natural Law in the Spiritual World, a highly regarded polemic on the scientific principle of continuity and its extension from physical to spiritual realms.