 Historian and Washington specialist Frank E. Grizzard, Jr. highlights "Providence" as the central feature of Washington's religious faith, noting that "Providence" was Washington's most often-used term for God.In 2006 Peter Lillback, the president of Westminster Theological Seminary, published a lengthy book through his own non-profit organization on the subject of Washington's religious beliefs.The book, "George Washington's Sacred Fire", proposed that Washington was an orthodox Christian within the framework of his time; it gained attention through promotion on Glenn Beck's show.