He Who Observes and Measures the Appearances of the Phenomenal World

Q. Define, then, the physical scientist.

A. The physical scientist is he who observes and measures the appearances of the phenomenal world and from his data draws conclusions as to the nature of their causes. He deals, therefore, only with the form side of manifestation.

Eugene Milne Cosgrove
The Science of the Initiates

Source: The Science of the Initiates