In its application to natural science Grosseteste based his method of verification and falsification on two assumptions about the nature of reality. … - Alistair Cameron Crombie

The strategic act by which Grosseteste and his thirteenth- and fourteenth-century successors created modern experimental science was to unite the experimental habit of the practical arts with the rationalism of twelfth-century philosophy.

By this lux as the first corporeal form Grosseteste did not, of course, mean simply visible light. As an emanation or propagation of substance and power lux was the basis of all bodily magnitude and of all natural operations, of which the manifestation of visible light was only one. One of the most important functions of lux was to be the intermediary between spirit and matter. It was the instrument by which God produced the macrocosm of the universe, and the instrument by which the soul made contact with the physical body and the things of sense in the microcosm of man.

To understand events as experienced by actual men and institutions we must be concerned with the history of errors and false starts as well as successes-although we make this distinction on the basis of what we now know of the tradition of success. As we go back in time the uncertainty of the outlook and of the objectives of scientific inquiries increases. The essence of the scientific movement is research. The answers to the essential question, what to do in scientific research-what questions to put to nature, by what methods to get answers, what to count as satisfactory answers-became clear only by the accumulation of successes and the marking of failures.