2015 Reprint of 1951 Edition. Full facsimile of the original edition. Not reproduced with Optical Recognition Software. One of the founders of existentialism, the eminent philosopher Karl Jaspers here presents for the general reader an introduction to philosophy. In doing so, he also offers a lucid summary of his own philosophical thought. In Jaspers' view, the source of philosophy is to be found "in wonder, in doubt, in a sense of forsakenness," and the philosophical quest is a process of continual change and self-discovery.