Knowledge the more we see that Perception alone without
Knowledge leads to false concepts, and these in their turn create
fatal obstacles and difficulties to our progress towards the true
appreciation of the Universe. Let me give a few examples.

In early times the Sun and the Stars were seen to revolve round the
Earth once every day, and, without Knowledge of Astronomy, this was
taken for granted as an absolute fact, and was looked upon as a
reality; later on, however, it was noted that the Stars never changed
their relative positions; this necessitated a new concept, namely,
that they were fixed on the inner surface of a huge globe, which was
also revolving. This false concept brought other difficulties into
play, the question arose as to what was beyond the globe, and also the
difficulty that, when the Stars as well as the Sun were found to be
at such enormous distances from the Earth, their rates of motion were
quite inconceivable. Even in the case of the Sun the motion represents
over twenty-five million miles per hour, and the apparent motion of
the Stars is thousands of times faster than Light travels. These
insuperable difficulties were not swept away until, by the advance of
Knowledge, the falsity of Conception, based only upon appearance, was
made manifest, and it was seen that it was the Earth which revolved
and not the Stars. Even then, owing to its supposed antagonism to what
was stated in the Bible, the new Conception was opposed with great
bitterness, it being long looked upon and denounced as a sacrilegious
invention, and anybody daring to promulgate such a doctrine was
threatened with death.

Our present Conception, that the Earth turns round on its axis once
every day, and rolls in its orbit round the Sun once in every year,
may be called a Reality to our finite Senses; but I shall show later
on that, except for the finiteness of our senses and the imperfection
of our Knowledge, the Concept is not a true one. With perfect
Perception and perfect Knowledge we shall see that, apart from the two
limitations or modes under which our physical senses act, there can be
no such thing as Motion, because the very essence of Motion is but
the product of those limitations, namely, Time and Space.

We are so accustomed to take everything for granted, that it may
perhaps seem strange to question whether it can even be asserted that
we have ever seen matter. Let us turn towards a common object in this
room. We cat