Observation is a passive science, experimentation an active science.

Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and y…

The science of life is a superb and dazzlingly lighted hall which may be reached only by passing through a long and ghastly kitchen.

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…