Full Idea
Perhaps even though general things like eyes could be imaginary, still one must admit that certain other things that are even more simple and universal are true.
Gist of Idea
Even if my body and objects are imaginary, there may be simpler things which are true
Source
René Descartes (Meditations [1641], §1.20)
Book Reference
Descartes,René: 'Discourse on Method/The Meditations', ed/tr. Sutcliffe,F.E. [Penguin 1968], p.97