Full Idea
Let us then suppose the Mind to be, as we say, white Paper, void of all characters, without any Ideas; How comes it to be furnished? ..To this I answer, in one word, from Experience.
Gist of Idea
The mind is a blank page, on which only experience can write
Source
John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 2.01.02)
Book Reference
Locke,John: 'Essay Concerning Human Understanding', ed/tr. Nidditch,P.H. [OUP 1979], p.106
A Reaction
The simple objection is that minds could make nothing of their experience if they were totally blank. But if we add principles of association, we might still say that there are no actual ideas imprinted in the original mind, only functions or faculties.