April 24, 1891.
After I had gone upstairs to bed last night, I found I had left a book downstairs which I was reading, and I went down again to recover it. I could not find any matches, and had some difficulty in getting hold of the book; it is humiliating to think how much one depends on sight.
A whimsical idea struck me. Imagine a creature, highly intellectual, but without the power of sight, brought up in darkness, receiving impressions solely by hearing and touch. Suppose him introduced into a room such as mine, and endeavouring to form an impression of the kind of creature who inhabited it. Chairs, tables, even a musical instrument he could interpret; but what would he make of a writing-table and its apparatus? How would he guess at the use of a picture? Strangest of all, what would he think of books? He would find in my room hundreds of curious oblong objects, opening with a sort of hinge, and containing a series of laminae of paper, which he would discern by his delicacy of touch to be oddly and obscurely dinted. Yet he would probably never be able to frame a guess that such objects could be used for the communication of intellectual ideas. What would he suppose them to be?
The thought expanded before me. What if we ourselves, in this world of ours, which seems to us so complete, may really be creatures lacking some further sense, which would make all our difficulties plain? We knock up against all sorts of unintelligible and inexplicable things, injustice, disease, pain, evil, of which we cannot divine the meaning or the use. Yet they are undoubtedly there! Perhaps it is only that we cannot discern the simplicity and the completeness of the heavenly house of which they are the furniture. Fanciful, of course; but I am inclined to think not wholly fanciful.