To get the full value of joy you must have someone to divide it with.

Joy has an odd arithmetic, since sharing it tends to make it larger rather than smaller. Telling someone good news makes it more real, their pleasure adds to yours, and the memory gains a second keeper. Private happiness is still happiness, but it can feel unfinished, as though part of it were waiting for a witness.

If you are short of people right now, this need not be a painful reminder. Sharing can be small: a message to an old friend, a word with a neighbour, a note to someone who once helped. Next time something goes well, tell one person before the feeling fades.