Hao Wang (1921-1995) was one of the few confidants of the great mathematician and logician Kurt Godel. A Logical Journey is a continuation of Wang's Reflections on Godel and also elaborates on discussions contained in From Mathematics to Philosophy. A decade in preparation, it contains important and unfamiliar insights into Godel's views on a wide range of issues, from Platonism and the nature of logic, to minds and machines, the existence of God, and positivism and phenomenology.

The impact of Godel's theorem on twentieth-century thought is on par with that of...