Of this world of reflective thought I shall say just a word in what follows.
11.

REFLECTIVE THOUGHT .-- If we ask our neighbor to meet us somewhere at a given hour, he has no difficulty in understanding what we have requested him to do.

If he wishes to do so, he can be on the spot at the proper moment.

He may never have asked himself in his whole life what he means by space and by time.

He may be quite ignorant that thoughtful men have disputed concerning the nature of these for centuries past.
And a man may go through the world avoiding disaster year after year by distinguishing with some success between what is real and what is not real, and yet he may be quite unable to tell us what, in general, it means for a thing to be real.