Foundation World Unity - 'Abdu'l-Bahá
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Page 45 of  112

THE CRITERIONS OF TRUTH
During my visit to London and Paris last year I had many talks with the materialistic philosophers of Europe. The basis of all their conclusions is that the acquisition of knowledge of phenomena is according to a fixed, invariable law,-- a law mathematically exact in its operation through the senses. For instance, the eye sees a chair; therefore there is no doubt of the chair's existence. The eye looks up into the heavens and beholds the sun; I see flowers upon this table; I smell their fragrance; I hear sounds outside, etc., etc. This, they say, is a fixed mathematical law of perception and deduction, the operation of which admits of no doubt whatever; for inasmuch as the universe is subject to our sensing, the proof is self- evident that our knowledge of it must be gained through the avenues of the senses. That is to say, the materialists announce that the criterion and standard of human knowledge is sense perception. Among the Greeks and Romans the criterion of knowledge was reason; that whatever is provable and acceptable by reason must necessarily be admitted as true. A third standard or criterion is the opinion held by theologians that traditions or prophetic statement and interpretations constitute the basis of human knowing. There is still another, a fourth criterion upheld by religionists and metaphysicians who say that the source and channel of all human penetration into the unknown is through inspiration. Briefly then, these four criterions according to the declarations of men are: First-- Sense Perception; Second-- Reason; Third-- Traditions; Fourth-- Inspiration. (45:1)

In Europe I told the philosophers and scientists of materialism that the criterion of the senses is not reliable. For instance, consider a mirror and the images reflected in it. These images have no actual corporeal existence. Yet if you had never seen a mirror you would firmly insist and believe that they were real. The eye sees a mirage upon the desert as a lake of water but there is no reality in it. As we stand upon the deck of a steamer the shore appears to be moving, yet we know the land is stationary and we are moving. The earth was believed to be fixed and the sun revolving about it but although this appears to be so, the reverse is now known to be true. A whirling torch makes a circle of fire appear before the eye, yet we realize there is but one point of light. We behold a shadow moving upon the ground but it has no material existence, no substance. In deserts the atmospheric effects are particularly productive of illusions which deceive the eye. Once I saw a mirage in which a whole caravan appeared traveling upward into the sky. In the far north other deceptive phenomena appear and baffle human vision. Sometimes three or four suns called by scientists "mock suns" will be shining at the same time whereas we know the great solar orb is one and that it remains fixed and single. In brief, the senses are continually deceived and we are unable to separate that which is reality from that which is not. (45:2)

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