Introduction.- The Universality of Religious Beliefs.- The Contradictions and Consequences of Religious Beliefs.- The Evolution of Human Ancestors.- The Most Amazing Window on Human Nature.- Why Qualia and Consciousness Seem Mysterious.- The Word-Grounding Problem and the Incompleteness of Language.- The Roots of Knowledge.- Abstract and Imaginary Objects.- Nature Is Logical, Because Logic Is Natural.- Faith and the Validation of Beliefs.- Contradictory Beliefs or "Schizodoxia" is a Poor Mechanism of Adaptation.