Full Idea
The same thought can be grasped by many people. The components of a thought, and even more so the things themselves, must be distinguished from the presentations which in the soul accompany the grasping of a thought.
Gist of Idea
Many people have the same thought, which is the component, not the private presentation
Source
Gottlob Frege (Review of Husserl's 'Phil of Arithmetic' [1894], p.325)
Book Reference
-: 'Mind July 1972' [-], p.325
A Reaction
This is the basic realisation, also found in Russell, of how so much confusion has crept into philosophy, in Berkeley, for example. Frege starts down the road which leads to the externalist view of content.