I propose in this inquiry to take nothing for granted, but to bring even accepted theories to the test of first principles, and should they not stand the test, freshly to interrogate facts in the endeavor to discover their law. I propose to beg no question, to shrink from no conclusion, but to follow truth wherever it may lead. Upon us is the responsibility of seeking the law, for in the very heart of our civilization to-day women faint and little children moan. But what that law may prove to be is not our affair. If the conclusions that we reach run counter to our prejudices, let us not flinch; if they challenge institutions that have long been deemed wise and natural, let us not turn back.

Reasoning from first principles vs. reasoning by proxy.

The rights and duties of man thus simplified, it seems almost impertinent to attempt to illustrate truths that appear so incontrovertible: yet such deeply rooted prejudices have clouded reason, and such spurious qualities have assumed the name of virtues, that it is necessary to pursue the course of reason as it has been perplexed and involved in error, by various adventitious circumstances, comparing the simple axiom with casual deviations.
Men, in general, seem to employ their reason to justify prejudices, which they have imbibed, they cannot trace how, rather than to root them out. The mind must be strong that resolutely forms its own principles; for a kind of intellectual cowardice prevails which makes many men shrink from the task, or only do it by halves. Yet the imperfect conclusions thus drawn, are frequently very plausible, because they are built on partial experience, on just, though narrow, views.

I am guiding you to seek truth from the facts of the historical conditions of our society and to identify the problems. The correct solutions will come with the correct identification of the problems.

You must pursue facts for their own sake, but penetrated with a vivid sense of the problems of your own time. This is not a principle of perversion, but a principle of selection. You must have some principle of selection, and you could not have a better one than to pay special attention to the history of the social problems which are agitating the world now, for you may be sure that they are problems not of temporary but of lasting importance.