Aikido tactics are grounded in sword tactics.  Here the tactic of Object Displacement is used as a calibration device geared toward cultivating a harmony between one’s Angle of Deviation and one’s Angle of Deflection.  If one’s movement across and off the Line of Attack is in harmony with one’s defensive/offensive response, one simply cannot be struck.  It is from this “shielded” position that one dominates the centerline by displacing the opponent’s sword with his or her own.  If one’s Angle of Deviation and Angle of Deflection are not in harmony with each other, Object Displacement will not occur.  In such a case, the initiating sword will maintain its dominance over the centerline and easily strike a target along the vertical line of attack. Uke: Sean Sanders - Shodan. (1 minute, 9 seconds)