The 'system' cultivates what Stanislavski calls the "art of experiencing" (to which he contrasts the "art of representation"). It mobilises the actor's conscious thought and will to activate other, less-controllable psychological processes—such as emotional experience and subconscious behaviour—sympathetically and indirectly. In rehearsal, the actor searches for inner motives to justify action and the definition of what the character seeks to achieve at any given moment (a "task"). Stanislavski's earliest reference to his 'system' appears in 1909, the same year that he first incorporated it into his rehearsal process. The MAT adopted it as its official rehearsal method in 1911.