Thought moves upon itself. An action is visualized in mind. Perhaps a scene is played out with feeling. it takes on the quality of already being there. The mind then further sharpens its foucs. The details are brought into more resolution. Complexity and texture make the scene "more" real. You begin to have the feeling of the Certainty of this scene. Open yourself up to area of influence that brings this scene to life. Expand within. Accept the possibilities.