The author of this book is a scientist who is concerned to discover the relationship which must be sustained between philosophy, religion and science if our modern civilization is to have a firm and defensible ideological base. He has here brought his contributions to the Conferences on Science, Philosophy and Religion which have been have held annually, since 1940. He is endeavoring here to interpret the spirit of modern science. In particular he is concerned to demonstrate that the relativism of modern science is not hostile to democratic or ethical values nor is it responsible for agnosticism or skepticism, as is often alleged. Rather, he maintains that the relativism of modern science is an indispensable aid to true religion. Religion sets the goals for life; science teaches us how to arrive at them. Therefore, he claims, quoting Einstein, that ""science without religion is blind; religion without science is lame"". A well written and scholarly book for those interested in philosophy, religion and science and their relationships.