|Lest the reader
imagine that the march of modem science has made this explanation out of date, it may be
recalled that neither Chemistry nor Biology nor any other physical science explains
anything. Plato depicted mankind as chained in a cave in such a way that they can look
only on the wall which forms the back of the cave; they cannot see the busy life outside
but only the shadows which objects moving in the sun shine cast on the walls of the cave.
For the captives in the cave, the shadows constitute the whole
phenomenal world, the world of reality remaining forever beyond their ken. Sir James
Jeans, the great physicist, says that modem science has come to the same conclusion. The
reality behind the phenomenal world is unreachable.