2.

As to the question how these visions and predictions of future events are produced, let him attempt to explain them who understands by what power we are to account for the great wonders which are wrought in the mind of every man when his thoughts are busy. For we see, and we plainly perceive, that within the mind innumerable images of many objects discernible by the eye or by our other senses are produced,--whether they are produced in regular order or in confusion matters not to us at present: all that we say is, that since such images are beyond all dispute produced, the man who is found able to state by what power and in what way these phenomena of daily and perpetual experience are to be accounted for is the only man who may warrantably venture to conjecture or propound any explanation of these visions, which are of exceedingly rare occurrence. For my part, as I discover more plainly my inability to account for the ordinary facts of our experience, when awake or asleep, throughout the whole course of our lives, the more do I shrink from venturing to explain what is extraordinary. For while I have been dictating this epistle to you, I have been contemplating your person in my mind,--you being, of course, absent all the while, and knowing nothing of my thoughts,--and I have been imagining from my knowledge of what is in you how you will be affected by my words; and I have been unable to apprehend, either by observation or by inquiry, how this process was accomplished in my mind. Of one thing, however, I am certain, that although the mental image was very like something material, it was not produced either by masses of matter or by qualities of matter. Accept this in the meantime from one writing under pressure of other duties, and in haste. In the twelfth of the books which I have written on Genesis this question is discussed with great care, and that dissertation is enriched with a forest of examples from actual experience or from trustworthy report. How far I have been competent to handle the question, and what I have accomplished in it, you will judge when you have read that work; if indeed the Lord shall be pleased in His kindness to permit me now to publish those books systematically corrected to the best of my ability, and thus to meet the expectation of many brethren, instead of deferring their hope by continuing further the discussion of a subject which has already engaged me for a long time.