memory and movements

we remember people's faces by their expressions. their smiles, laughter, subtle movements and the body language in general. hand gestures and the way one walks and such. we can memorize a moving form better than a still one. a moving form has more functional meaning than a still object. it is obviously more lively which is what we are attracted to i guess. but mobility does not necessarily mean that the form should be physically moving. in still life paintings, the contour and color juxtapositions make a moving effect in our mind. when contours intersect, when one line takes from another and the like, our eye creates a movement. complementary colors and opposite colors create a vibrancy. as surface becomes live, it makes an impact.