This brief Work, intended for wistful agnostics and reluctant atheists, is based upon the premise that disbelief is rampant today because modern man has been conditioned to reject belief in any reality transcending the physical world. Evidence for the reality of God is very strong, Mr. Cassels says; and he goes on to point out ways in which one can test the possibility of God's existence on the basis of this evidence: the Bible, the personal experience of God, God in society, etc. Cassels is probably the most graceful of present-day writers in the field and one of the most persuasive. His ""tests,"" more affective than intellectual in nature, are really ad hominem arguments for God's existence; but they are good-natured arguments, nonpolemical in nature, and supradenominational in application. Not everyone's cup of tea, obviously; and certainly not that of the proponents of rigid dogmatism. But Cassels' earlier works, with his originality of thought and presentation, will assure a comparatively wide readership.