Berkeley’s critics often treated him as though he had denied the existence of the world. That is not fair. He denied matter, not tables. But the fairness of the doctrine does not rescue it from all difficulty. The most serious objections strike at the structure of his view: its account of continuity, its reliance on God, and its attempt to preserve objectivity after removing the material bearer of objectivity. The controversy was not a mere scholastic quarrel over words. It was a dispute about whether common life, scientific practice, and the stability of the world itself could be saved once the philosophical term “matter” had been removed from the ledger.
The most famous immediate critic was Samuel Johnson, though the famous kicking of a stone belongs more to anecdote than to philosophy. What matters is the intuitive protest Johnson voiced: the hardness of the stone seems to refute Berkeley. The scene is often remembered because it is so concrete: a man, a stone, the blunt force of resistance, the bodily recoil of a foot meeting what appears to be an immovable object. But Berkeley had anticipated the move. The hardness, he would say, is precisely a felt resistance in experience, not evidence for a hidden material substrate. The objection therefore misses the target. Yet Johnson’s instinct points to a deeper worry: if all we ever have are ideas, can we really speak of a shared public world rather than a private sequence of appearances? That question is not answered by the pain of a kicked stone. It is answered, if at all, by the architecture of the whole system.
The stakes of that question were high because Berkeley’s theory was not confined to a single startling claim. It was meant to secure ordinary objects, not erase them. In that sense, the doctrine was vulnerable in a particular way: if critics could show that it failed to preserve the ordinary stability of tables, chairs, rooms, roads, and books, then the system would appear to have betrayed the very common sense it claimed to vindicate. Berkeley’s defense turned on the idea that the object is not a hidden lump of matter but an intelligible pattern in experience. His critics pressed the practical problem: what becomes of continuity when perception stops? What exactly persists between one moment and the next? The worry is not abstract. It is the difference between a world held together by a rule and a world held together by a mind.
A second objection arises from Hume’s more radical skepticism. Hume admired Berkeley’s attack on matter but pressed it further, suggesting that if we distrust the idea of substance, we may have reason to distrust the self as well. Berkeley had wanted to save spirits as active perceivers, but Hume’s analysis of the mind as a bundle of perceptions threatens that refuge. The result is ironic. Berkeley removes matter to protect certainty, and Hume uses Berkeley’s own tools to unsettle the self that remains. In the history of philosophy, this is one of the most consequential acts of reinterpretation: a system built to preserve a stable knowing subject becomes a stepping-stone toward dissolving that subject into a succession of impressions.
This pressure matters because Berkeley’s spirits are not decorative additions. They are the active poles of his account, the perceivers whose existence underwrites the coherence of experience. If that pole weakens, the whole arrangement trembles. Hume’s criticism therefore reaches beyond a technical disagreement. It exposes the fragility of any attempt to rescue certainty by moving it from matter to mind. Once mind itself is analyzed as something unstable, what remains of the secure foundation Berkeley thought he had found?
There is also the question of divine perception. Berkeley answers the problem of objects unperceived by finite minds by appealing to God’s eternal perception. But critics have often asked whether this is an explanation or a relabeling. If the apple exists when no human sees it because God sees it, then the independence of the world has not really been vindicated; it has merely been transferred from matter to theology. For believers, this may be a strength. For philosophers seeking a non-theological account of objectivity, it is a significant cost. The point is not simply that God is invoked. It is that God is doing the explanatory work that matter once did. The result is a system in which the visible world remains public and orderly, but its permanence depends on an invisible guarantor.
That dependence creates a particular tension in the ordinary case. Imagine an empty room in which a chair sits overnight. No human perceives it; yet we confidently say it persists. Berkeley replies that God perceives it and that the chair’s identity consists in its place within an ordered sensory system. This is ingenious, but it may look like a metaphysical revision of ordinary speech that preserves appearances at the cost of explanatory economy. The room seems empty to us, but it is never truly unobserved. The chair survives because it is continuously held within divine awareness. The price of Berkeley’s consistency is that every ordinary object becomes anchored in an unseen divine mind.
A third objection concerns science. Berkeley says natural philosophy studies regular appearances, not matter itself. That sounds congenial to a modern instrumentalist view, but critics worry that it deprives scientific explanation of depth. If a law is only a record of divine habit, then why should nature have the stable causal independence required for experimentation? Berkeley can answer that divine constancy guarantees regularity. Yet the answer may not satisfy those who want science to describe the world without recourse to theological commitment. The issue is not whether the experiments work. It is whether their success reveals anything more than a dependable sequence arranged by God. For natural philosophers, that is a serious limitation. It leaves the explanatory ambition of science partly unfulfilled.
A fourth pressure comes from counterexamples involving unperceived existence. These are not exotic thought experiments; they arise from the most ordinary habits of life. A chair left in a room, a book closed on a desk, a house seen only from the street, a road no one is presently walking—all seem to persist without anyone’s actual awareness. Berkeley’s reply depends on keeping the world intelligible through a continuous divine presence. But critics may feel that such a reply saves doctrine by multiplying unseen assumptions. It does not merely tell us why the object continues; it tells us why we should think the object was ever unperceived at all, since divine perception prevents true absence from being an option.
One surprising turn in these debates is that Berkeley can seem both radical and conservative at once. He is radical in rejecting matter, but conservative in preserving everyday discourse and religious belief. This combination worried opponents because it made the philosophy hard to dismiss. It did not merely negate; it reinterpreted. And reinterpretation is often more unsettling than denial. A denial can be rejected outright. A reinterpretation asks the critic to show why the old language should be trusted in the first place. Berkeley’s strategy therefore threatened not only metaphysics but the very authority of inherited explanatory habits.
A further tension lies in his use of language. Berkeley argues that words can function as signs without standing for abstract ideas. But if so much philosophical error comes from misuse of language, how are we to distinguish genuinely clarified talk from merely revised talk? Critics may suspect that Berkeley has traded ontological mystery for semantic discipline without proving that the discipline tracks reality rather than convenience. The danger here is subtle. If the same everyday words can be retained while their philosophical meaning shifts, then philosophy may appear to have solved a problem by redrawing the map rather than by discovering new ground. That suspicion was not enough to refute Berkeley, but it was enough to make his system seem precariously dependent on the success of its own verbal reform.
Still, the strongest objection may be the one that Berkeley himself felt most keenly: whether his system can explain the felt resistance of the world without reducing it to divine choreography. The ordinary object does not merely appear in sequence; it opposes us, surprises us, and exceeds our plans. Berkeley can interpret this as the firmness of established order. But some readers may feel that the very independence of things, the sense that the world is not of our making, has not been fully captured. A stone does not simply appear hard; it resists the foot, the tool, the hand, the intention. That resistance is part of what makes the world appear objective. If objectivity is only the regularity of ideas governed by God, then critics may wonder whether the world has become too orderly to remain fully resistant.
And yet the objections only reveal how ambitious the system was. Berkeley did not merely offer a puzzle about perception. He asked whether modern philosophy had mistaken a useful fiction for a necessary truth. His critics forced him to show where the fiction ended and the world began. That debate did not kill his view; it gave it a second life in later philosophy, where the very terms of realism and idealism would be reconsidered under his shadow. In that sense, the tension was not an accident at the edge of the system. It was the system’s lasting power: the fact that it could be attacked at the stone, the chair, the self, the science, and still force philosophy to ask what, exactly, it means for anything to exist at all.