To Move or not to move: that is the crucial question.

Movement is very crucial to a character's portrayal. How many times have you seen a character say one thing but show an entirely different emotion by the way they move. If the mind and the body aren't working as one cohesive unit, the charachter may not be seen as genuine. Everything must be as real as possible. As Stanizlavski put it, what would I do if I was in the charachter's position?