# A world of ideas need not be a private illusion

Commentary on Orthodoxy by G. K. Chesterton.

On [CH03.P010](https://glosses.org/orthodoxy/pg16769-r1/CH03.P010/#char=209,254): "the view of everything as a personal illusion"

The qualification matters: Chesterton describes universal illusion, not every philosophy that makes perceived objects dependent on mind. Berkeley supplies a useful counterexample, though he is not named as the target. In the *Principles of Human Knowledge* (first published 1710; inspected here in David R. Wilkins's transcription of the 1734 edition), §§29–36 distinguish sensory objects from inventions of the imagination. Their order and independence from our wills preserve a difference between reality and fantasy; Berkeley denies material substance, not the existence of the sun, trees, or bodies. His argument is intended to resist scepticism, as §§86–88 make explicit. [Berkeley, §§29–36, 86–88](https://www.maths.tcd.ie/~dwilkins/Berkeley/HumanKnowledge/1734/HumKno.html).

This does not refute Chesterton's conditional claim about an unreal cosmos. It prevents an unwarranted expansion of that claim: denying mind-independent matter does not by itself leave thought without objects. Chesterton's own admission that the effect is indirect and doubtful leaves room for precisely this distinction.

## Sources

- [George Berkeley, A Treatise concerning the Principles of Human Knowledge](https://www.maths.tcd.ie/~dwilkins/Berkeley/HumanKnowledge/1734/HumKno.html), §§29–36 and 86–88; Wilkins transcription of 1734 text
- [David R. Wilkins, edition description](https://www.maths.tcd.ie/~dwilkins/Berkeley/HumanKnowledge/), Statement identifying Jacob Tonson's 1734 edition as the transcription's basis

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