Man has risen so far above all other species that he competes in ways unique in nature. He fights by means of complicated weapons; he fights for ends remote in time.

No right of preference exists in favor of person, property, or business. Personal claims and ambitions must yield in favor of whatever best serves the general welfare.

When I watch species other than my own, their instinct's wisdom is what most impresses and disturbs me.

This is earth again, the earth where I've lived and now will live once more ... I've been to eternity and back. I know how the dead would feel to live again.

We can have peace and security only so long as we band together to preserve that most priceless possession, our inheritance of European blood, only so long as we guard ourselves against attack by foreign armies and dilution by foreign races.

In a time of war, truth is always replaced by propaganda.

Science, freedom, beauty, adventure: what more could you ask of life?