Full Idea
How do I know that God did not bring it about that there is no earth or heavens, no extension, shape, size or place, and yet that all these things appear to me precisely as they do now?
Gist of Idea
God may have created nothing, but made his creation appear to me as it does now
Source
René Descartes (Meditations [1641], §1.21)
Book Reference
Descartes,René: 'Discourse on Method/The Meditations', ed/tr. Sutcliffe,F.E. [Penguin 1968], p.98