We are doomed to choose and every choice may entail irreparable loss.

The underlying assumption that human nature is basically the same at all times, everywhere, and obeys eternal laws beyond human control, is a conception that only a handful of bold thinkers have dared to question.

Utopias have their value -- nothing so wonderfully expands the imaginative horizons of human potentialities -- but as guides to conduct they can prove literally fatal.

The intellectual power, honesty, lucidity, courage, and disinterested love of the truth of the most gifted thinkers of the eighteenth century remain to this day without parallel. Their age is one of the best and most hopeful episodes in the life of mankind.

Science cannot destroy the consciousness of freedom, without which there is no morality and no art, but it can refute it.

The case against the notion of historical objectivity is like the case against international law, or international morality; that it does not exist.

Both liberty and equality are among the primary goals pursued by human beings throughout many centuries; but total liberty for wolves is death to the lambs, total liberty of the powerful, the gifted, is not compatible with the rights to a decent existence of the weak and the less gifted.