This chapter formally introduces Diagram Therapy as a structure-oriented pre-study phase within the broader framework of Neural Superassets. Its function is to define and codify a precise protocol that prepares cognitive orientation, focus, and readiness before deep textual engagement begins. Rather than addressing learning itself, the chapter positions Diagram Therapy at the critical threshold of study initiation, where failures of focus and early cognitive fatigue most often occur. The chapter specifies Diagram Therapy as a short, time-bounded procedure aimed at constructing a preliminary spatial–semantic map of the study material through hierarchical diagramming. Detailed execution rules are articulated to ensure consistency and effectiveness, including constraints on physical posture, spatial environment, monochromatic representation, hierarchical structuring, minimal symbolic enrichment, and controlled use of icons. By documenting these rules, the chapter establishes Diagram Therapy as a non-decorative, non-summarizing, and non-interpretive method whose sole purpose is cognitive orientation. Within the overall study architecture presented in the book, Diagram Therapy is defined as a necessary prerequisite to subsequent phases such as deep content processing and knowledge consolidation, including the Kernel Note method. The chapter also situates Diagram Therapy in relation to Ancient Neural Assets, emphasizing its role in activating spatial orientation and map-construction systems without reiterating theoretical foundations covered elsewhere. Overall, the chapter functions as a formal methodological specification that operationalizes the transition from unfocused entry into stable, high-engagement study.