Happiness is a butterfly, which when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you.
I remember the noise of the bells ringing at school as the effigy of Guy Fawkes we'd prepared earlier was carried out on a canvas stretcher, hoisted on to the huge bonfire and set alight. Then the revelry would begin. My school friends and I would all have sparklers we passed around, lighting one from another.
As always on this boulevard, the faces were young, coming annually in an endless migration from every country, every continent, to alight here once in the long journey of their lives.
I think when people mean that Discworld books have become darker they really mean the series is growing up. In 'The Colour of Magic' most of the city is set alight. It's a joke, in much the same way that the Earth is destroyed almost at the start of Douglas Adams's 'The Hitchhikers Guide to the Galaxy.'
People who jump to conclusions rarely alight on them.
Where the despair of loneliness and poverty haunts every hour, the optimism to embark on new projects cannot find a place to alight on the brain's cortex. Poverty itself is an enormous obstacle to an enlightened and enlightening - not to say healthy - old age.
I never found either this or the Northern Shrike return to such prey for food. I have seen them alight on the same thorn bush afterwards, but never made any use of this kind of food.