Marie Kondo on The Life-Changing Magic of Tidying Up:
The things we own are real. They exist here and now as a result of choices made in the past by no one other than ourselves. It is dangerous to ignore them or to discard them indiscriminately as if denying the choices we made. This is why I am against both letting things pile up and dumping things indiscriminately. It is only when we face the things we own one by one and experience the emotions they evoke that we can truly appreciate our relationship with them.
There are three approaches we can take toward our possessions: face them now, face them sometime, or avoid them until the day we die. The choice is ours. But I personally believe it is far better to face them now. If we acknowledge our attachment to the past and our fears for the future by honestly looking at our possessions, we will be able to see what is really important to us.