Humankind's desire for peace can be realized only by the creation of a world government.

All our thoughts and concepts are called up by sense-experiences and have a meaning only in reference to these sense-experiences. On the other hand, however, they are products of the spontaneous activity of our minds; they are thus in no wise logical consequences of the contents of these sense-experiences. If, therefore, we wish to grasp the essence of a complex of abstract notions we must for the one part investigate the mutual relationships between the concepts and the assertions made about them; for the other, we must investigate how they are related to the experiences.

Imagination is the most powerful force in the universe.

It may be possible to fight intolerance, stupidity, and fanaticism seperately, but when they come together there is no hope.

Nationalism is an infantile disease. It is the measles of mankind.

The development of general ability for independent thinking and judgment should always be placed foremost, not the acquisition of special knowledge.

A forced faithfulness is a bitter fruit for all concerned.