In every man there is an instinctive and passionate reaction if his person or liberty is attacked.

Human nature, as manifested in tribalism and nationalism, provides the momentum of the machinery of human evolution.

Whichever theory we adopt to give a rational explanation of human existence, that theory must take into account and explain the mental nature we see at work in all modern communities.

I prize the conditions under which I have lived because they have permitted me to choose my opportunities, to inquire into such matters as interested me, and to publish what I believed to be true, uncontrolled by any central authority.

Universalism as an ideal is as old as nay, is probably much more ancient than the Christian ideal.

The main force used in the evolving world of humanity has hitherto been applied in the form of war.

Religious leaders and men of science have the same ideals; they want to understand and explain the universe of which they are part; they both earnestly desire to solve, if a solution be ever possible, that great riddle: Why are we here?