It helps if the air around and inside the body makes room for the thoughts that want to be thought. If the air has the room, finishing a thought and going on to the next thought or to action is easier.

If the air doesn't have room but people around breathing in and out don't care either way about the thoughts, focussing and persistance can make room for the thoughts.

If the air doesn't have room and the people around breathing in and out don't want that kind of thought to be thought, it gets difficult. It is necessary to both create the room for the thoughts against resistance and think them.

This is difficult and sometimes possible.