Full Idea
Blasius argued that prime matter is the subject of all our intellectual and moral states. This implies that such states cannot exist apart from the body, which seems to imply further that the soul itself cannot exist apart from the body.
Gist of Idea
Intellectual and moral states, and even the soul itself, depend on prime matter for their existence
Source
report of Blasius of Parma (Les quaestiones de anima (lectures on the soul) [1385], I.8 p.65) by Robert Pasnau - Metaphysical Themes 1274-1671 06.3
Book Reference
Pasnau,Robert: 'Metaphysical Themes 1274-1671' [OUP 2011], p.108
A Reaction
It seems that, under pressure, Blasius recanted this view in lectures given eleven years later.