What we don't know is much more than what we know.

External conditions can, to a certain extent, reduce, but never cancel individual repsonsibility.

Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.

The stupid are invincible.

Science is the century-old endeavor to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible.

Men like Henry George [ the pioneer of land value taxation] are rare, unfortunately. One cannot imagine a more beautiful combination of intellectual keenness, artistic form, and fervent love of justice.

The unleashed power of the atom has changed everything save our modes of thinking and we thus drift toward unparalleled catastrophe.