El teologo y academico Dallas Willard es ya desde hace mucho tiempo una voz elocuente que nos habla de la relevancia de Dios en nuestra vida cotidiana. Sus revolucionarios libros, La divina conspiracion, y El espiritu de las disciplinas cambiaron para siempre la forma en que miles de cristianos viven su fe. Es profesor en la Facultad de Filosofia de la Universidad de Carolina del Sur, y profesor visitante en la UCLA y la Universidad de Colorado. Vive en California del sur.

John Ortberg is the senior pastor of Menlo Park Presbyterian Church (MPPC) in the San Francisco Bay Area. His bestselling books include Soul Keeping, Who Is This Man?, and If You Want to Walk on Water, You ve Got to Get out of the Boat. John teaches around the world at conferences and churches, writes articles for Christianity Todayand Leadership Journal, and is on the board of the Dallas Willard Center and Fuller Seminary. He has preached sermons on Abraham Lincoln, The LEGO Movie, and The Gospel According to Les Miserables. John and his wife Nancy enjoy spending time with their three adult children, dog Baxter, and surfing the Pacific. You can follow John on twitter @johnortberg or check out the latest news/blogs on his website at www.johnortberg.com.