Full Idea
A mite must be supposed to see his own foot as a body of some considerable dimension, though they appear to you scarcely discernible.
Clarification
A mite is a small insect
Gist of Idea
A mite would see its own foot as large, though we would see it as tiny
Source
George Berkeley (Three Dialogues of Hylas and Philonous [1713], I p.170)
Book Reference
Berkeley,George: 'The Principles of Human Knowledge etc.', ed/tr. Warnock,G.J. [Fontana 1962], p.170
A Reaction
Berkeley is confused. Hot is secondary, but temperature is primary. Bigness is secondary, size primay. Midgets and tall people don't disagree over the size of a table.