In this new book, for the first time he sets out his own systematic philosophy of life. He is reviving an old question: how far in the direction of religious belief, and eternal happiness, is it possible to fo on the basis of reason alone? His "expressionist" philosophy leads him to conlusions that are both very startling and more positive than his critics might expect, and in an Appendix he sketches their theological corollaries. In effect, he is providing the new "ultralight" Christian humanism with its philosophical background and its world view.