This is a common theme in yoga classes, and in guided meditations. I have one yoga teacher who begins each class with this phrase, around the time she has us in a forward fold. We are bent forward at the waist, and she invites us to imagine there is a trap door on the top of our head, and it is open and all the thoughts are pouring out onto the yoga mat.
“Let go of that which no longer serves you.”
After one class, I asked my teacher: “Does that apply to people?”