The Key to Life Life, the only true life, is the great goal. And for John, to bring to birth real knowledge and experience of this life among his readers and hearers is his overriding purpose. But such life is found in one place only: it is ‘life in his name’ (20:31, cf. 14:6). So belief, personal faith in the one and only God as made known in Jesus Christ, is the matter of crucial importance for John the evangelist. And belief is firmly grounded on evidence: the first hand testimony of those who