Many actors routinely equate his system with the American Method, although the latter's exclusively psychological techniques contrast sharply with the multivariant, holistic and psychophysical approach of the "system", which explores character and action both from the 'inside out' and the 'outside in' and treats the actor's mind and body as parts of a continuum. In response to his characterisation work on Argan in Molière's "The Imaginary Invalid" in 1913, Stanislavski concluded that "a character is sometimes formed psychologically, i.e. from the inner image of the role, but at other times it is discovered through purely external exploration." In fact Stanislavski found that many of his students who were "method acting" were having many mental problems, and instead encouraged his students to shake off the character after rehearsing.