History of Western Philosophy - Bertrand Russell [82]
This, however, is a digression, from which we must return to Socrates.
We come now to the intellectual aspect of the religion which Plato (rightly or wrongly) attributes to Socrates. We are told that the body is a hindrance in the acquisition of knowledge, and that sight and hearing are inaccurate witnesses: true existence, if revealed to the soul at all, is revealed in thought, not in sense. Let us consider, for a moment, the implications of this doctrine. It involves a complete rejection of empirical knowledge, including all history and geography. We cannot know that there was such a place as Athens, or such a man as Socrates; his death, and his courage in dying, belong to the world of appearance. It is only through sight and hearing that we know anything about all this, and the true philosopher ignores sight and hearing. What, then, is left to him? First, logic and mathematics; but these are hypothetical and do not justify any categorical assertion about the real world. The next step—and this is the crucial one—depends upon the idea of the good. Having arrived at this idea, the philosopher is supposed to know that the good is the real, and thus to be able to infer that the world of ideas is the real world. Later philosophers had arguments to prove the identity of the real and the good, but Plato seems to have assumed it as self-evident. If we wish to understand him, we must, hypothetically, suppose this assumption justified.
Thought is best, Socrates says, when the mind is gathered into itself, and is not troubled by sounds or sights or pain or pleasure but takes leave of the body and aspires after true being; 'and in this the philosopher dishonours the body'. From this point, Socrates goes on to the ideas or forms or essences. There is absolute justice, absolute beauty, and absolute good, but they are not visible to the eye. 'And I speak not of these alone, but of absolute greatness, and health, and strength, and of the essence or true nature of everything.' All these are only to be seen by intellectual vision. Therefore while we are in the body, and while the soul is infected with the evils of the body, our desire for truth will not be satisfied.
This point of view excludes scientific observation and experiment as methods for the attainment of knowledge. The experimenter's mind is not 'gathered into itself', and does not aim at avoiding sounds or sights. The two kinds of mental activity that can be pursued by the method that Plato recommends are mathematics and mystic insight. This explains how these two come to be so intimately combined in Plato and the Pythagoreans.
To the empiricist, the body is what brings us into touch with the world of external reality, but to Plato it is doubly evil, as a distorting medium, causing us to see as through a glass darkly, and as a source of lusts which distract