This lecture explores the study of the brain and nervous system, explaining how they influence thoughts, emotions, behavior, and bodily functions. It delves into the multidisciplinary nature of modern neuroscience, emphasizing the importance of integrating clinical, experimental, and theoretical perspectives to gain a comprehensive understanding of brain function. The lecture also discusses the role of genes, proteins, cells, circuits, and brain regions in complex abilities and diseases, offering insights into cutting-edge technologies used to analyze, simulate, and intervene in the brain.