700 Common Words Exercise No. 16
We can see, therefore, that the common expressions a
long life and a short life have real meaning only when thought of in relation
to the life of the man in the street, the number of years on which insurance
companies base their figures. But we seem at present ready to ask questions and
willing to hear the answers, so let us ask one or two further questions. What
do the words long and short mean when in regard to distances? What do we mean
when we say a place is near or far, when we say a thing is of light weight or
is heavy, when we say that we are moving more or less quickly? What do we mean
when we say that an object is great or is small? We find that all these
expressions have real meaning only when one object is considered in relation to
some other object. The life of a man is short almost beyond measure when
considered side by side with the life of man upon earth, past and future. So,
too, is any distance we have upon earth short beyond measure when considered
side by side with the distances which are beyond the earth. If we move round
the earth in a straight line the biggest distance we can cover is about 25
thousand miles. But if we look far far out beyond the earth we are faced with
distances in relation to which 25 thousand miles are as nothing. The most
distant object of which observations can at present be made is thought to be
140 million light-years away from the earth. Light, as we know, moves at
186,000 miles a second which, it is agreed, is a considerable rate. One light-year
is the distance which light covers moving throughout the year at a rate of
186,000 miles a second. When, therefore, it is stated that something is at a
distance from us of 140 million light-years, a distance is represented which it
is beyond our powers to picture. Our earth is large if measured by other
objects upon the earth, but it is a small thing of no importance whatever when
measured by objects outside the earth, when measured by the size of some of the
great masses of burning matter which we see as points of light above us at
night. We tell our friends, perhaps, that our weight is this or is that, but
here again we meet with difficulties. Our weight is different in different
parts of the world, while if we found ourselves on a body smaller than the
earth we should be so light that we could move about with an ease impossible
here. On the other hand, if we found ourselves on a body much bigger than the
earth, we should be so heavy that we could hardly move at all. We read in the
newspaper that a plane has reached the wonderful rate of over 600 miles an
hour, but what is a rate like this when thought of side by side with the rate
at which light moves? As for movement to the north or to the south, to the east
or to the west, we know that our movement can be judge only in relation to some
other object which is at rest or which can be said to be moving at a given rate
away from or towards us. The earth itself turning at a great rate and we do not
feel this movement of itself. We can judge the movement of the earth only in
relation to some other object which is not moving with it. We have probably all
had the experience of not being able to tell which way a train is moving at
night when we cannot see anything out of the windows. We cannot tell which way
we are moving or act what rate we are moving except in relation to another
object which is not moving with us. And so we find that many of the common
expressions of daily life have no meaning in themselves and become real for us
only when considered in relation to some other fact or object.
Ghulam Mustafa
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Punjab Civil Secretariat Lahore.
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Special Classes of Sir Isaac Pitman New Course, Old
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