Albert was deeply interested in astrology, as has been articulated by scholars such as Paola Zambelli and Scott Hendrix. Throughout the Middle Ages –and well into the early modern period– astrology was widely accepted by scientists and intellectuals who held the view that life on earth is effectively a microcosm within the macrocosm (the latter being the cosmos itself). It was believed that correspondence therefore exists between the two and thus the celestial bodies follow patterns and cycles analogous to those on earth. With this worldview, it seemed reasonable to assert that astrology could be used to predict the probable future of a human being. Albert argued that an understanding of the celestial influences affecting us could help us to live our lives more in accord with Christian precepts. The most comprehensive statement of his astrological beliefs is to be found in two separates works that he authored around 1260, known as the Speculum astronomiae and the De Fato. However, details of these beliefs can be found in almost everything he wrote, from his early De natura boni to his last work, the Summa theologiae. His speculum was critiqued by Gerard of Silteo.