The Fifth Dimension

John Hick's The Fifth Dimension presents a sophisticated philosophical defense of religious belief through a pluralist framework that reconceptualizes spiritual reality as a distinct ontological dimension. Building upon his earlier work in religious epistemology and the philosophy of religious diversity, Hick develops an account that seeks to validate religious experience while avoiding both exclusivism and reductionism.

The monograph's central metaphor of a "fifth dimension" serves to articulate how transcendent reality intersects with empirical existence without being reducible to it. Hick argues that just as time constitutes a dimension beyond the three spatial dimensions, spiritual reality represents another dimensional aspect of existence that remains accessible through religious experience across diverse traditions. This framework allows him to maintain that different religions apprehend the same ultimate reality through culturally conditioned conceptual schemes, a position that extends his well-known pluralist hypothesis.

Methodologically, Hick employs philosophical theology to navigate between purely naturalistic accounts of religion and traditional exclusivist claims. He engages critically with both secular dismissals of religious experience and particularist theologies that privilege one tradition's truth claims. The work draws extensively on comparative religion, epistemology, and phenomenology to construct what Hick presents as a more adequate account of humanity's religious life.

A significant portion of the text addresses eschatological verification, revisiting and refining Hick's earlier arguments about the post-mortem validation of religious beliefs. He contends that religious claims, while not empirically verifiable in present experience, possess a logical structure that permits future verification. This move attempts to preserve the cognitive content of religious belief while acknowledging the epistemic limitations of finite human existence.

The work's importance lies in its ambitious attempt to provide a theistic response to both religious diversity and naturalistic challenges. Against exclusivists, Hick argues that the universality of religious experience across cultures points toward a common transcendent source. Against naturalists, he maintains that religious experience cannot be adequately explained through purely psychological or sociological categories. His fifth dimension hypothesis offers a model for understanding how ultimate reality might relate to empirical reality without contradiction.

Hick's contribution advances debates about religious epistemology, the relationship between science and religion, and the philosophical viability of religious pluralism, making it essential reading for those engaging contemporary philosophy of religion.