The stability of the internal medium is a primary condition for the freedom and independence of certain living bodies in relation to the environment surrounding them.

Science admits no exceptions; otherwise there would be no determinism in science, or rather, there would be no science.

All the vital mechanisms, varied as they are, have only one object, that of preserving constant the conditions of life in the internal environment.

The mental never influences the physical. It is always the physical that modifies the mental, and when we think that the mind is diseased, it is always an illu…