And especially at this time of year, we think of the men and women serving overseas in our armed forces. We are forever grateful to all those who put themselves at risk to keep us safe.
Service and duty are not just the guiding principles of yesteryear. They have an enduring value which spans the generations.
I myself had cause to reflect this year, at Westminster Abbey, on my own pledge of service made in that great church on Coronation Day 60 years earlier.
The anniversary reminded me of the remarkable changes that have occurred since the coronation, many of them for the better. And of the things that have remained constant, such as the importance of family, friendship and good neighbourliness.
But reflection is not just about looking back. I and many others are looking forward to the Commonwealth Games in Glasgow next year.
The baton relay left London in October and is now on the other side of the world on its way across 70 nations and territories before arriving in Scotland next summer. Its journey is a reminder that the Commonwealth can offer us a fresh view of life.
My son Charles summed this up at the recent meeting in Sri Lanka. He spoke of the Commonwealth's family ties that are a source of encouragement to many.
Like any family, there can be differences of opinion. But however strongly they're expressed, they are held within the common bond of friendship and shared experiences.
Here at home, my own family is a little larger this Christmas. As so many of you will know, the arrival of a baby gives everyone the chance to contemplate the future