There's a famous old zen story about two monks watching a flag blowing in the wind.
"It's the flag that moves," one monk said.
"It's the wind that moves," the other argued.
The abbott came walking by. "It's your mind that moves," he told them.
When I obsess about some woman from years past, it's my mind that moves. When I work myself into a rage over the state of the nation, it's my mind that moves. When I fret about my lack of productivity, it's my mind that moves.