You could say that it was Kant who pointed out that the empiricist's ideas of the 'blank slate' were fallacious. — Wayfarer
"Here we have a wide ocean before us, but we must set our sails. Were sense knowledge and understanding [against Hobbes] ,then he that sees light and colours, and feels heat and cold, would understand light and colours, heat and cold, and the like of sensible things... Whereas the mind of man remaineth altogether unsatisfied, concerning the nature of these corporeal things, even after the strongest sensations of them, and is but thereby awakened to a further... inquiry and search about them, what this light and colours, this heat and cold...should be; and whether they be indeed qualities in the objects without us or only phantasms and sensations in ourselves."
- Ralph Cudworth
EDIT:
"The essences of light and colours’, saith Scalinger, ‘are as dark to the understanding as they themselves are to sight’. Nay, undoubtedly so long as we consider these things no otherwise than sense represents them, that is as really existing in the objects without us, they are and must needs be eternally unintelligible. Now when all men naturally enquire what these things are, what is light, and what are colours, the meaning hereof is nothing else but this, that men would fain know or comprehend them by something of their own which is native and domestic, not foreign to them, some active exertion or anticipating of their own minds…"
- Cudworth
I shouldn't keep out Henry More, either:
"That the exact Idea of a Circle or a Triangle is rather hinted to us from those describ'd in Matter then taught us by them, is still true notwithstanding that Objection, that they seem exist to our outward Senses carelessly perusing them, though they be not so. For we plainly afterward correct our selves, not onely by occasion of the figure, which we may ever discern imperfect, but by our Innate knowledge, which tells us that the outward Senses cannot see an exact Triangle, because that an Indivisible point, in which the Angles are to be terminated, is to the outward Sense utterly invisible."
- Henry More
"But now for other Objections, That a Blind man would be able to discourse of Colours, if there were any Innate ideas in his Soul, I say, it does not at all follow; because these Ideas that I contend to be in the Soul, are not Sensible, but Intellectual, such as are those many Logical, Metaphysical, Mathematical, and some Moral Notions. All which we employ as our own Modes of considering sensible Objects, but are not the sensible Objects themselves, of which we have no Idea, but onely a capacity, by reason of the Organs of our Body, to be affected by them. The reason therefore of a blind man's inability of discoursing of Colours, is only that he has no Substratum or Phantasm of the Subject of the discourse, upon which he would use these innate Modes or frame of Notions that are naturally in his Mind, and which he can make use of in the speculation of sundry other sensible Objects.”
- Henry More
EDIT EDIT: No more edits, promise!
@Mww, this might pique your interest. These are the people referred to by the great philosophy historian Arthur Lovejoy, as having articulated Kant's philosophy (some important parts of it at least) by several decades, yet these are barely known at all. I learned about it through Chomsky.
In any case Lovejoy, for some unknown reason, was very Anti-German, so, his opinion on German philosophers are to be taken with a grain of salt. Still, he makes a valid point. As I said, maybe this is the type of stuff you find interesting. I don't know.