Any physiological explanation becomes generalized into mechanistic physiology, any achievement of self awareness into intellectualist psychology, and mechanistic physiology or intellectualist psychology bring behaviour down to the same uniform level and wipe out the distinction between abstract and concrete movement, between Zeigen Goldstein himself, who tended (as we have seen in the preceding note) to relate Greifen to the body and Zeigen to the categorical attitude, is forced to go back on this 'explanation'.