The materials gathered together in this Study Companion are intended to stimulate study of Bahá'u'lláh's Book of Certitude, the Kitáb-i-Iqán. With repeated use in classes, they have evolved over a number of years into their present form, which may be used for both individual and group study. It is intended that these notes will assist the student of the Iqán to acquire a broader vision of its fundamental themes and truths and prove a convenient point of reference for explanations not always at hand.