Belief begins where science leaves off and ends where science begins.

Life itself is but the expression of a sum of phenomena, each of which follows the ordinary physical and chemical laws.

Brevity in writing is the best insurance for its perusal.

Belief cannot be reckoned with in terms of science, for science and faith are mutually exclusive.

Medical statistics will be our standard of measurement: we will weigh life for life and see where the dead lie thicker, among the workers or among the privileged.

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.

Medicine is a social science, and politics is nothing more than medicine on a grand scale.