The Message of the Upanishads is a study, verse by verse, of three of the principal Upanishads, namely, Isha, Kena and Katha, in the light of modern thought and modern needs. Though constituting a small portion of the total Upanishadic literature, they yet contain a lucid exposition of all the essential ideas of this immortal literature. The spiritual insights of the Upanishads are an exception to the tyranny of time. Subsequent scientific advances have not only not affected their truth-value but have, on the contrary, only helped to reveal the rational basis of their insights and enhanced their spiritual appeal. This is no wonder, because these insights are the products of an equally scientific investigation into a different field of experience, namely, the world of man’s inner life.