Fred. L. Polak explored the mechanisms of social change in terms of ''
future-visions'' held by a community. The future, says Polak, particip
ates actively in the present, providing part of the context within whi
ch today's decisions are made. Barbara McClintock acquired her insight
s in maize genetics by developing ''a feeling for the organism.'' New
insights, she maintains, emerge through a mutual relationship between
researcher and subject. Though scholars in different fields, both ackn
owledge the power of images in the creative process. There is a differ
ence in the extent to which each scientist perceives this power to be
available to create new ideas.