इस पुस्तक में काम, मजदूरी, योग्यतम का अस्तित्व और बहुत कुछ शामिल है।

The unceasing change, the insecurity, and the misery of life make it necessary to find some basis of certainty on which to rest if happiness and peace of mind are to be maintained. All science, philosophy, and religion are some many efforts in search of this permanent basis; all interpretations on the universe, whether from the material or spiritual side, are so many attempts to formulate some unifying principle or principles by which to reconcile the fluctuations and contradictions of life.

It has been said that mathematics is the only exact science; that is, the only science that eternally works out true without a single exception. Yet mathematics is but the body of which ethics is the spirit. There is not a mathematical problem but has its ethical counterpart, and the spirit of ethics is as eternally exact as the form of mathematics.