Christmas is a rare occasion when we are reminded that we have obligations to people we did not choose to be related to, and that love is not just a spontaneous feeling but something we sometimes really have to work at, with people we may not even much like.

True humility is expressed in deeds, not words. The humble are those who truly walk the same ground as everyone else - not necessarily with grovelling, hunched backs, but certainly not lording it over others, either.

Heathens are unredeemed outcasts from heaven who roam the planet without hope of surviving the deaths of their bodies. They may have values but they are not secured by any divine source. Yet we embrace this because we think it represents the truth.

Looking out over the port of Dover, with the endless steam of boats coming in and out, every British citizen is reminded that belonging here has never been about blood or genes. It's simply about being at home on this discrete island and being aware of the privileges and responsibilities that brings.

Believers are right when they say that to understand a religion properly you need to get under its skin. But to understand it fully, you cannot stay there: you have to take a more objective view, too.

When you try to translate any kind of real-life problem into a neat logical form, you're almost always simplifying it. We need a kind of blend - we need to use not just tools of logic, which are important and valuable - I'm not denying that, but also tools of judgement, and of inductive and abductive reasoning which can also inform.

In my experience, those who make the biggest fuss about not spending much at Christmas are generally the ones who buy what they want and eat where they want 12 months a year.