Henri & Henri on Movement

| November 7, 2011

People make gestures: they gesticulate.

—Henri Lefebvre, Rhythmanalysis

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It follows that sight and touch could not have given us the idea of space without the help of the “muscular sense.” Not only could this concept not be derived from a single sensation, or even from a series of sensations; but a motionless being could never have acquired it, because, not being able to correct by his movements the effects of the change of position of external objects, he would have had no reason to distinguish them from changes of state. Nor would he have been able to acquire it if his movements had not been voluntary, or if they were unaccompanied by any sensations whatever.

—Henri Poincare, Science and Hypothesis