"The enclosure of the mind" denotes a trend in the western thought history. It is a combined operation; how, where and in what the mind has been enclosed. Where is the place of the mind? -Our scientific common sense teaches us that it is in the individual brain. This represents a completed feature of "the enclosure of the mind". The opposite idea is the panpsychism, though, it would certainly be felt somewhat "fishy". Under this view, mechanisms such as communications from mind to mind should be natural, which would appear more doubtful. -This "fishiness" is an effect of "the enclosure of the mind" in the modern ages. There has been, however, no successful scientific proof of the "scientific common sense", yet. In a word, this is an opinion that the Zeitgeist has constructed, and the trustworthy appearance derives from the fact that it reflects the ground note of the modern world. In this article, this phenomenon is analyzed from three dimensions: , , and . They are in the thought history to form "Modern ages of the mind". Intertwined in the meanings, they are logically independent. These factors have produced an apparently bold new phenomenon. But, it can be analyzed as a revival of the traditional human-centrism and the rationalism that characterize the history of the West European thought.