There are normal times when it is wholly admirable to be steadfast, resolute, unconflicted, and therefore when integrity is unmistakenly a virtue. The person of integrity knows what to do, and does it. But as we have been exploring, there are also times when certainty and single-mindedness indicate something less admirable: a deafness to voices that should be heard or a blindness to aspects of a situation that need to be considered.

The absolutist takes himself to read nature in her very own language, but the relativist insists that nature does not speak, and we hear only what we have elected to hear.

The absolutist trumpets his plain vision; the relativist sees only someone who is unaware of his own spectacles.

This doctrine, that of the ghost in the machine, strictly separates the mind or soul from the body. And by doing so it takes the soul outside the sphere of mechanical or scientific explanation. It splits the world of the mind from the world of science. It is often supposed to protect our cherished free will.

The absolutist takes himself to speak to the ages, with the tongue of angels, but the relativist hears only one version among others, the subjectivity of the here and now.

The gods we make in our own image are tribal gods. They tell you how very, very little you should tolerate outsiders, who are less favoured of the Lord. Amazingly, there are no recorded cases of the holy man going up the mountain and finding that it's the others who are right. It always turns out that God wants unbelievers to suffer, and what could be more noble than to help him a little? When religion rules, toleration disappears, for you cannot cherish the verdict of death to the infidels, yet also tolerate those who disagree - for those are the very same infidels.

There may be rhetoric about the socially constructed nature of Western science, but wherever it matters, there is no alternative. There are no specifically Hindu or Taoist designs for mobile phones, faxes or televisions. There are no satellites based on feminist alternatives to quantum theory. Even that great public sceptic about the value of science, Prince Charles, never flies a helicopter burning homeopathically diluted petrol, that is, water with only a memory of benzine molecules, maintained by a schedule derived from reading tea leaves, and navigated by a crystal ball.