We assume a common sense as the necessary condition of the universal communicability of our knowledge, which is presupposed in every logic and every principle of knowledge that is not one of skepticism.

Man desired concord; but nature knows better what is good for his species; she desires discord. Man wants to live easy and content; but nature compels him to leave ease... and throw himself into roils and labors.

Everything in nature acts in conformity with law.

How then is perfection to be sought? Wherein lies our hope? In education, and in nothing else.

Maximum individuality within maximum community

Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: 'War is bad in that it begets more evil than it kills.'

Freedom in the practical sense is the independence of the power of choice from necessitation by impulses of sensibility