Human greatness has many connotations. Since the requirements for
membership in this category are vague and poorly defined, admittance to
the Mount Olympus is frequently erratic and subjective, especially in
view of a wide "penumbra zone"* of border cases. Nevertheless, rising
above a twilight zone of debatable cases, there are individuals whose
right for mem- bership is unquestionable. In science, one of the
unequivocal criteria for "greatness" relates to how far one's scientific
achievement affects the opening of new horizons, and points to
directions for future development and progress. Unveiling new visions
can derive only from creative people who conceive original ideas and
con- cepts, and who are daring enough to promote them against the
indifference or opposition of the establishment. Maintaining the
integrity and the faith to one's own ideals may require extraordinary
strength of character, - up to courting persecution or even death, - as
happened in the middle ages, and more recently, in the first half of
this century with regard to Cecile and Os- kar Vogt, whose lives and
accomplishments are described in this book. Thus the greatness of the
Vogts is based both on their penetrating vision of the future for brain
research and on the sterling quality of their character, which sustained
a "test of fire" during the Nazi years in Germany.