This chapter examines the tension between mysticism and science in Aldous Huxley’s novels of ideas. It deploys the new critical terminology of Rachel Potter and Matthew Taunton and illustrates its utility. Those Barren Leaves (1925) is a good example of the ‘comic novel of ideas’, in that the high seriousness of Cardan and Calamy’s disputations is interspersed with low farce. Point Count Point (1928) exemplifies the ‘serious novel of ideas’: in addition to staging a Hegelian dialectic between the paganism of Rampion and the Manicheanism of Spandrell, the narrative tests their ideas. Eyeless in Gaza (1936) is an ‘asymmetric novel of ideas’: the dialectic between a version of D. H. Lawrence’s philosophy and a broadly Buddhist worldview is enacted in the person of Anthony Beavis, rather than being expounded in ‘character-character dialogue’. Beavis’ metaphor of the ocean and the waves signals the triumph of mysticism over Lawrence’s ‘psychological atomism’.

According to many physicists, several aspects of the laws of nature, the constants, and the cosmic boundary conditions are fine-tuned for life: had they been slightly different, life would not have existed. Here I review the claimed instances of fine-tuning and some of the criticism that has been levelled against the fine-tuning considerations. I also discuss in which sense, if any, fine-tuned parameters may qualify as improbable. Finally, I review the naturalness criterion of theory choice and discuss how violations of naturalness may be regarded as relevant to the discussion about fine-tuning for life.