The discussion of the realms of existence has long shaped philosophical inquiry. Mullā Ṣadrā correlated the levels of being with the three modes of human cognition and, through his innovative defense of the connected imaginal realm, introduced a significant transformation in Islamic philosophy and offered new perspectives on issues such as bodily resurrection. Price, in a different context, arrived at the notion of an imaginal world through his examination of documented parapsychological evidence, a view that eventually attracted considerable philosophical attention. This study, using library-based research and a comparative method, investigates how Ṣadrā and Price conceive the relationship between the imaginal world and human immortality. Their accounts display notable similarities, including the comparison of postmortem life to dreaming, the central role of the imaginative faculty, and the idea of an imaginal or “image-body” as the vehicle of posthumous experience. However, meaningful differences also emerge, rooted in their distinct philosophical commitments and methods of reasoning. Ṣadrā, drawing on his ontological framework and the graded structure of existence, argues for immortality through the immateriality of the imaginal realm, whereas Price relies on philosophical psychology and the phenomenological analysis of mental experiences, supported by parapsychological observations. The study’s contribution lies in presenting a coherent comparative interpretation of Ṣadrā’s and Price’s views on immortality, the mode of awakening in the imaginal world, and the conditions shaping a desirable postmortem existence.