Our understanding of experience and behaviour would not be complete without reference to the physical and material aspect of our personal existence. Our physicality represents a further expression of our being created in the Divine Image. Physiological psychology, also known as biological psychology or behavioural neuroscience, explores the profound connection between the brain, the body, and behaviour. It seeks to understand how the structure and function of the nervous system, hormones, neurotransmitters, and genetic influences shape our thoughts, emotions, and actions. This field illuminates the biological foundations of mental processes, from the way neurons fire during moments of joy, to how the brain adapts under stress or trauma. Its significance lies not only in helping to unravel some of the mysteries of human behaviour but also in offering life-changing insights into mental health, addiction, sleep, and neurological disorders. By bridging biology and psychology, physiological psychology empowers us to better understand ourselves and others, fostering treatments and habits that can promote resilience, healing, and overall well-being. In the words of the Psalmist, we praise God that we are ‘fearfully and wonderfully made’ (Psalm 139).