The question raised by George Berkeley occupies an important place in this series of dialogues with Sustenesis Theory. Berkeley asks whether material substance is really necessary. What we call objects, he argues, are collections of ideas in perception. We cannot step outside perception to contact a completely independent material substratum; thus to be is to be perceived. To secure the continuity of the world, he appeals to God’s constant perception. If we treat this thought only as a historical doctrine, we miss its pressure. The real issue is how this problem forces Sustenesis Theory to clarify its own boundaries.
The answer of Sustenesis Theory can begin with one sentence: To be perceived is not the whole of existence; existence requires perception and worldly constraint together. This is not a simple translation of George Berkeley into a new vocabulary. It is a way of placing the problem inside the relations among difference, constraint, structure, and maintenance. Sustenesis Theory is not primarily interested in whether an idea sounds elegant; it asks whether the idea explains why something can continue to hold as an existent structure.
Sustenesis Theory acknowledges that Berkeley touches a crucial point. The world never appears to us as a naked thing outside experience. We encounter a world perceived, bodily processed, and linguistically organized. But Sustenesis Theory does not reduce existence entirely to being perceived. Perception itself requires worldly constraint.
In this framework, no existent stands alone as a sealed object. It maintains itself between internal difference and external constraint. Difference prevents it from becoming an empty sameness; constraint prevents it from dispersing into chaos; maintenance allows it to continue through change. This framework is not designed to erase the uniqueness of each philosopher, but to let each problem enter a more concrete analysis of structural persistence.
If a table is only my idea, why does it remain similarly usable for different people? Why does it appear again with relative stability when I close and reopen my eyes? Not because a deity watches it for me, but because a stable relation forms between perceptual structure and external constraint. The table is neither a purely subjective idea nor a thing-in-itself completely detached from experience. It is an object-structure maintained through perception and practice.
If George Berkeley presses the question further, Sustenesis Theory cannot answer with a single abstract formula. It has to explain how the relevant structure forms boundaries, how it resists disturbance, how it repairs itself when strained, and how it collapses when it can no longer be maintained. The point is not to provide a universal slogan, but to return problems often mystified, substantialized, or over-conceptualized to an analyzable process of maintenance.
This also means that historical philosophers are not old materials already surpassed. Each of them provides pressure. Some force Sustenesis Theory to explain origin, some change, some subjectivity, some language, politics, society, and value. A theory becomes more serious only when it can endure these pressures without turning into a closed circle of its own terminology.
The importance of George Berkeley lies in exposing a tension that is easily overlooked. Many theories swing between two extremes: treating the world as fixed substance or dissolving it into formless flow; making the subject an absolute center or dissolving the subject into external relations; worshiping reason or completely distrusting it. Sustenesis Theory does not choose one side too quickly. It asks how structure is maintained within these tensions.
Sustenesis is therefore not static preservation, nor is it arbitrary becoming. It is bounded continuation. A living body must metabolize; a thought must answer new problems; a society must absorb conflict; a self must integrate memory, body, emotion, and relation. Real stability does not mean the absence of change, but the ability of change not to destroy structure. Real freedom does not mean the absence of constraint, but the understanding of constraint and its participation in higher self-maintenance.
Berkeley’s value is to remind us that the world’s appearance cannot be separated from perception. Sustenesis Theory adds that perception cannot be separated from worldly structure either. Existence is neither merely being seen nor entirely outside seeing. It continues to hold in structural relations that are perceivable, operable, and repeatedly confirmable.
The dialogue between Sustenesis Theory and George Berkeley is therefore not meant to prove that George Berkeley already anticipated Sustenesis Theory. Nor is it meant to reduce a complex thinker to a modern concept. More precisely, his philosophy forces Sustenesis Theory to speak more clearly. To be perceived is not the whole of existence; existence requires perception and worldly constraint together. This sentence is both a response to him and a development of Sustenesis Theory itself.