Contemporary psychological models often assume that insight, meaning, or relational reorganization can be pursued independently of somatic stability and regulatory integrity. Clinically, this assumption contributes to recurrent failures: insight without sustainability, expression without containment, and meaning-making that collapses under stress. These failures are not primarily errors of interpretation or motivation, but failures of structural availability. Building on a multidimensional architectural framework of psychological organization, this paper formalizes a principle of lower-dimensional primacy: higher-order psychological functions remain conditionally available and may become unreliable or temporarily inaccessible when lower-order domains are sufficiently destabilized relative to task demands. Destabilization may arise either from insufficient structural capacity or from excessive load imposed by external events. Psychological continuation is therefore not achieved by maximizing “integration across all domains at once,” but through adaptive sequencing that preserves structural integrity and restores functional flow across time. This paper clarifies what lower-dimensional primacy is and is not, differentiates expression from pathology, distinguishes congestion from collapse in trauma-related states, and situates continuation as a recoverable capacity rather than a static achievement. The framework is descriptive rather than prescriptive, does not propose a universal developmental hierarchy, and is not a staged treatment protocol. It specifies minimal architectural conditions under which psychological systems can adapt, reorganize, and return to continuation without collapse. Permissions NoticeThis work is licensed under Creative Commons Attribution–NonCommercial–NoDerivatives 4.0 International (CC BY-NC-ND 4.0). Any use involving adaptation, modification, translation, educational deployment, therapeutic application, derivative modeling, or inclusion in external platforms beyond unchanged archival hosting requires explicit written permission from the author.