Bahá'í scholar, Nader Saiedi in his "Gate of the Heart" (Wilfrid Laurier University Press, 2010) has characterised his followers by their fervent millenarian expectations, their complex mystical and esoteric knowledge, their insistence on the absolute transcendence of the divine Essence, their rejection of the doctrine of "wahdatu’l-wujúd", their reinterpretation of the traditional doctrine of bodily resurrection ("ma'ad-i-Jismani"), and their ambiguous assertions concerning the necessity of the presence of a living Gate (a Báb) to the Hidden Imám for the guidance of the Shí'i community.