The consideration of this difficulty it was that gave birth to my Essay towards a New Theory of Vision, which was published not long since, wherein it is shown that or outness is of itself by sight, nor yet apprehended or judged of by lines and angles, or anything that has a necessary connexion with it; but that it is to our thoughts by certain visible ideas and sensations attending vision, which in their own nature have no manner of similitude or relation either with distance or things placed at a distance; but, by a connexion taught us they come to signify and suggest them to us, after the same manner that of any language suggest the ideas they are made to stand for; insomuch that a man blind and afterwards made to see, would not, at first sight, think the things he saw to be without his mind, or at any distance from him.