"The definition of this methodical procedure
was believed possible only in connexion with
the classical concept of causality developed
in the course of Renaissance science, when the
foundations of mathematical physics were
laid. It did not occur to historians of ideas
that the awareness of the conditions of
scientific experiment was possible apart from
mathematical physics, i.e., under the rule of
the magical causality of the Middle Ages, the
intrinsic rationalism of which, once this
Weltanschauungwas accepted, is not poorer
than that developed under modern concepts
of causality.2 The following example is to
show that the magical process could be, and
in fact was, comprehended in analogy to the
'natural' process in modern sense, even by the
magician himself"