Full Idea
Anything physical which is given in person can be non-existing, no mental process which is given in person can be non-existing.
Gist of Idea
The physical given, unlike the mental given, could be non-existing
Source
Edmund Husserl (Ideas: intro to pure phenomenology [1913], II.2.046), quoted by Victor Velarde-Mayol - On Husserl 3.3.5
Book Reference
Velarde-Mayol,Victor: 'On Husserl' [Wadsworth 2000], p.57
A Reaction
This endorsement of Descartes shows how strong the influence of the Cogito remained in later continental philosophy. Phenomenology is a footnote to Descartes.