1651. Then they also spoke in a way that the face was not speaking at the same time, or going along with a responsive motion of the whole, as before, but that the face was at rest as far as I could tell, and now they were speaking in the brain, so that the brain was moving in a like manner. This sympathetic vibrating motion I could not feel so much, but it was a language of ideas even more uninterrupted, so as to be like one single continuous mental image consisting of many. Yet I could understand it.