Without "ethical culture", there is no salvation for humanity.

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.

A thought that sometimes makes me hazy: Am I - or are the others crazy?

There is possibility in every difficulty.

In order to be an immaculate member of a flock of sheep, one must above all be a sheep oneself.

Ever since childhood I have scorned the commonplace limits so often set upon human ambition. Possessions, outward success, publicity, luxury - to me these have always been contemptible. I believe that a simple and unassuming manner of life is best for everyone; best both for the body and the mind

The most superior of scientific goals is to embrace a maximum of experiment with a minimum of hypotheses.