No. 331, July, 1885, p. 223.
For our consciousness of God is obviously very different from a figment of the imagination, or the sort of reality experienced in a dream. This is not the place to develop such an argument, but it seems to me more than doubtful whether we can even imagine something absolutely non-existent in nature. When the artist's imagination would construct, e.g., a winged dragon, the concept is always made up of parts which are real—eyes like an alligator, bat-wings, scales of a fish or crocodile, and so forth. All the members or parts are real, put together to form the unreal. I do not believe that any instance of a human conception can be brought forward which on analysis will not conform to this rule.
British Association Address.
October, 1880, p. 587.