The Age of Reason is left the Dark Ages of the history of mechanics. Clifford A. Truesdell) 1. 1 THE INVISIBLE TRUTH OF CLASSICAL PHYSICS There are some questions that physics since the days of Newton simply cannot an- swer. Perhaps the most important of these can be categorized as 'questions of eth- ics', and 'questions of ultimate meaning'. The question of humanity's place in the cosmos and in nature is pre-eminently a philosophical and religious...