The basis of science is the empirical method, which uses the senses to build up a picture of the world; but science tells us that our senses have evolved to help us get by, not to show us the world as it is. Science is only a systematic examination of our impressions, and in the end all each of us has left are our own sensations ... The end-result of the empirical method, then, is that each individual is left alone with their own experiences. We can escape this solitude, Balfour suggested, only if we accept that there is a divine mind.
From a Darwinian point of view, human beliefs are adaptations to our part of the world. No doubt much of what we believe must be roughly accurate, or else we would not have survived. But the beliefs we have evolved might latch on to the world only enough to help us stumble our way through it, and then only for the time being. Human belief-systems could be useful illusions, appearing and disappearing as they prove to be more or less advantageous in the random walk of natural selection. Might not evolution be one of these illusions? Scientific naturalism is the theory that human beliefs are evolutionary adaptations whose survival has nothing to do with their truth. But in that case scientific naturalism is self-defeating, since on its own premises scientific theories cannot be known to be true.
The heterodox current in Judaism led by Jesus seems to have had no notion of an immortal soul, created by God and then infused into the body: immortality meant being raised from the dead in the body one had in life, then living for ever in a world without decay or corruption. In the Christian religion invented by Paul and Augustine, which was strongly influenced by Plato, immortality meant something quite different - a life out of time, enjoyed by the 'soul' or 'spirit' of the departed. How this Platonic immortality could preserve anything like the persons that once lived was not made clear.
An old fairy tale has it that science began with the rejection of superstition. In fact it was the rejection of rationalism that gave birth to scientific inquiry. Ancient and medieval thinkers believed the world could be understood by applying first principles. Modern science begins when observation and experiment come first, and the results are accepted even when what they show seems to be impossible.
Much in the study of the paranormal was what we would now call pseudo-science. But the line between science and pseudo-science is smudged and shifting; where it lies seems clear only in retrospect. There is no pristine science untouched by the vagaries of faith.
The belief in unity that has fuelled so many utopian dreams is an effort to reconcile the irreconcilable that ends in repression. Berlin suggests we renounce this venerable faith, and learn how to live with intractable conflict.
Against the many Russian thinkers influenced by Hegel who believed that history was governed by universal laws to which one could only submit, Turgenev upheld the freedom of different societies to pursue different paths of development and of individuals to pursue, even in opposition to powerful historical forces, their own goals and values. Here Turgenev endorsed the celebrated dictum of Alexander Herzen, with whom he disagreed on other matters: that history has no libretto. Human history is a realm of contingency and unpredictability, in which each generation faces conflicts that have no ideal solution.
The repression of liberty that took place in the countries in which Communist regimes were established cannot be adequately explained as a product of backwardness, or of errors in the application of Marxian theory. It was the result of a resolute attempt to realize an Enlightenment utopia - a condition of society in which no serious form of conflict any longer exists.
The idea of politics as a conservation in which the collision of opinions is moderated and accommodated, in which what is sought is not truth but peace, has been almost entirely lost, and supplanted by a legalist paradigm in which all political claims and conflicts are modelled in the jargon of rights.
