It must be born in mind that one does not see directly - as is the case in the exploration of the surface of the brain - where the electrodes are attacking.

Exact information about the functional significance of the deep sections of the brain is only obtained by working through the brain histologically in serial section.

This implies that the laws governing organic cohesion, the organization leading from the part to the whole, represent a biological uncertainty, indeed an uncertainty of the first order.

The goal of physiological research is functional nature.

In fact, quantitative findings of any material and energy changes preserve their full context only through their being seen and understood as parts of a natural order.

At the beginning of all experimental work stands the choice of the appropriate technique of investigation.