Lumen Fidei is an encyclical written in part by Pope Benedict XVI and completed by Pope Francis that addresses the nature of faith in the contemporary world. In the first chapter Francis describes faith as a supernatural gift by which all other truth is illuminated, using the life of Abraham and the history of Israel to illustrate "what faith is." He then examines how Christ's death produces the fullness of faith and reorients the life of the believer and the believing community. The second chapter covers the relationship between faith, truth, and love, touching on the role of reason and theology in the quest for true faith. Chapter three discusses the role of the Church in transmitting and nurturing faith, particularly through the sacraments and prayer; chapter four considers the impact of faith on the common good, the family, and social relationships. The encyclical concludes by highlighting the faithful example of the Virgin Mary.