Ruhi Institute Book Six, Teaching the Cause, enhances the capability of the participants to teach. Teaching is a sacred duty of every Baha'i; connecting the human heart to the Revelation of Baha'u'llah and setting in motion a process of spiritual transformation. This teaching aid is designed based on Sections 6-20 of "The Act of Teaching" in Ruhi Book Six with the aim of improving our skills and abilities as teachers of the cause. It focuses on the central concepts and ideas that are essential to explaining the Baha'i Faith by making use of selected Holy Writings, quotations and visual aids.