A boat needs mooring ropes at several points. When the wind is up, or the bank uneven, you put out 'springers' to keep the boat steady and secure.
And so do we. Some people attach us to our lives in obvious or mundane ways. Some are not really vital. Some wiggle and tug. But a good mooring rope is a precious thing. The springers don't just moor us. They make life better- more comfortable, better balanced, safer.
Take one away, and everything needs rebalanced. Like the lost tooth, the demolished landmark, the stolen wallet full of ID, the constant draughty reminders of absence chill the back of the neck.