Imprisoned quacks are always replaced by new ones.

Laws should be made, not against quacks but against superstition.

Cellular pathology is not an end if one cannot see any alteration in the cell. Chemistry brings the clarification of living processes nearer than does anatomy. Each anatomical change must have been preceded by a chemical one.

The physicians are the natural attorneys of the poor, and the social problems should largely be solved by them.

The task of science is to stake out the limits of the knowable, and to center consciousness within them.

The task of science, therefore, is not to attack the objects of faith, but to establish the limits beyond which knowledge cannot go and found a unified self-consciousness within these limits.

The body is a cell state in which every cell is a citizen. Disease is merely the conflict of the citizens of the state brought about by the action of external forces.