Among the objections to the reality of objects of sense, there is one which is derived from the apparent difference between matter as it appears in physics and things as they appear in sensation. Men of science, for the most part, are willing to condemn immediate data as "merely subjective, " while yet maintaining the truth of the physics inferred from those data. But such an attitude, though it may be *capable* of justification, obviously stands in need of it; and the only justification possible must be one which exhibits matter as a logical construction from sense-data―unless, indeed, there were some wholly *a priori* principle by which unknown entities could be inferred from such as are known. It is therefore necessary to find some way of bridging the gulf between the world of physics and the world of sense, and it is this problem which will occupy us in the present lecture. Physicists appear to be unconscious of the gulf, while psychologists, who are conscious of it, have not the mathematical knowledge required for spanning it. The problem is difficult, and I do not know its solution in detail. All that I can hope to do is to make the problem felt, and to indicate the kind of methods by which a solution is to be sought."―from_ Our Knowledge of the External World_, p. 107. Betrand Russell
About This Quote

We live in a world where we are led to believe that the world around us is an absolute truth. However, this is not the case at all. The way the world appears to us today is only a small part of what it truly is. The world is constantly changing and there are different ways that our senses perceive it.

The world that we see with our eyes is not the same as the world that exists in reality. Not everything that can be seen can be seen with our eyes, there are many invisible things which have no physical form. There are also many things which cannot be felt with our hands, or heard by our ears.

Our senses are not always reliable and they are mostly limited to what they can see or hear or feel. It does not mean that there is no truth, but that it is still an illusion, something that comes from the outside of us and not from within us.

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