Full Idea
A true idea must correspond with its ideate or object.
Gist of Idea
A true idea must correspond with its ideate or object
Source
Baruch de Spinoza (The Ethics [1675], I Ax 6)
Book Reference
Spinoza,Benedict de: 'Ethics, Improvement of Understanding, Letters', ed/tr. Elwes,R [Dover 1955], p.46
A Reaction
Allowing for his usage of 'idea' and 'object', this seems to be a straightforward commitment to the modern correspondence theory, perhaps the earliest clear statement of it. I agree with him.