The scientific spirit is of more value than its products, and irrationally held truths may be more harmful than reasoned errors.
The man of science has learned to believe in justification, not by faith, but by verification.
History warns us ... that it is the customary fate of new truths to begin as heresies and to end as superstitions.
Very few, even among those who have taken the keenest interest in the progress of the revolution in natural knowledge set afoot by the publication of the 'Origin of Species'; and who have watched, not without astonishment, the rapid and complete chan...
