Abstract. − Drawing on ethnographic research conducted in urban and rural communities in Egypt’s Nile Delta, this research explicates, within a broad perspective, the significance of dreams to Egyptians encompassing their relationship to the world with its seen and unseen dimensions. It also demonstrates the sociocultural and cosmological conditions that bring about moral and social support to certain dreams for constructing and reconstructing reality. There is a mutual substantiation between the dreamworld and Egyptian cosmology in the sense that certain dream visions are justified or sanctified by religious worldviews, while some significant aspects of worldviews, especially those related to invisible domains, are validated and substantiated by dreams. [Egypt, Middle East, dreams, worldviews, cosmology, Islam]