4. * But does it only cause this in the time of sickness, or preternatural disorder? Nay, but more or less, at all times, even in a state or perfect health. Let a man be ever so healthy, he will be more or less delirious, every four-and-twenty hours. For does he not sleep? And while he sleeps, is he not liable to dream? And who then is master of his own thoughts, or able to preserve the order and consistency of them? Who can then keep them fixt to any one point, or prevent their wandering from pole to pole?
5. * But suppose we are awake, are we always so awake, that we can steadily govern our thoughts? Are we not unavoidably exposed to contrary extremes, by the very nature of this machine, the body? Sometimes we are too heavy too dull and languid, to pursue any chain of thought. Sometimes, on the other hand, we are too lively. The imagination, without leave, starts to and fro, and carries us away, hither and thither, whether we will or no: and all this, from the merely natural motion of the spirits, or vibration of the nerves.
6. * Farther, How many wanderings of thought may arise, from those various associations of our ideas, which are made entirely without our knowledge, and independently on our choice? How these connexions are formed we cannot tell: but they are formed in a thousand different manners. Nor is it in the power of the wisest or holiest of men, to break those associations, or to
