conception of the inherent order and nature of the universe of space and time imported a basic change in the pursuit of objective scientific inquiry itself, and correspondingly in the precise meaning and handling of scientific terms. That was nowhere more apparent than in the dynamic conception and meaning of “nature” or φύσις itself, and of reality or ἀλήθεια, for example, in their frequent synonymous relation to one another, which the Aristotelians failed to appreciate. Let us return again to