Date: 1690, 1694, 1695, 1700, 1706

"Let any one examine his own Thoughts, and throughly search into his Understanding, and then let him tell me, Whether all the original Ideas he has there, are any other than of the Objects of his Senses, or of the Operations of his Mind, considered as Objects of his Reflection: and how great a ma...

— Locke, John (1632-1704)

Date: Wednesday, July 2, 1712

"Perhaps there may not be room in the Brain for such a variety of Impressions, or the Animal Spirits may be incapable of figuring them in such a manner, as is necessary to excite so very large or very minute Ideas."

— Addison, Joseph (1672-1719)

Date: 1741

"So for Instance, in Children; they perceive and forget a hundred Things in an Hour; the Brain is so soft that it receives immediately all Impressions like Water or liquid Mud, and retains scarce any of them: All the Traces, Forms or Images which are drawn there, are immediately effaced or closed...

— Watts, Isaac (1674-1748)