The story goes that after Jacob took his family across the river, he came back because he had forgotten some small vessels. So again, why? These were clay vessels, not worth much.
The answer is this.
The soul of the righteous consists of 248 parts. But for the righteous, each part of his soul contains numerous sparks of many other righteous souls. Anything that comes to a righteous person in this world comes not only for him but also for the multiple sparks of other souls in him. So it is not his alone.
This is why the righteous love their possessions. And this is why Jacob came back for the small vessels, for if he did not, it would look as if he did not want them – but instead, he needed to show that he loved them too.
In the beginning, the spiritual forces wanted to imitate God by giving of their own. But they could not because God does not need anything. Out of this desire, they burst, and it was parts of these spiritual forces that Jacob came to retrieve.
Art: Jacob Wrestling with the Angel by Rembrandt Van Rijn