“The question is, of course, is it going to be possible to amalgamate everything,
and merely discover that this world represents different aspects of one thing?
Nobody knows. All we know is that as we go along, we find that we can amalga-
mate pieces, and then we find some pieces that do not fit, and we keep trying to
put the jigsaw puzzle together. Whether there are a finite number of pieces, and
whether there is even a border to the puzzle, is of course unknown. It will never
be known until we finish the picture, if ever. What we wish to do here is to see to
what extent this amalgamation process has gone on, and what the situation is at
present, in understanding basic phenomena in terms of the smallest set of principles.
To express it in a simple manner, what are things made of and how few elements
are there ?”