Man's mind stretched to a new idea never goes back to its original dimensions. — Oliver Wendell Jr. Holmes. US Supreme Court justice from 1902 to 1932
I think that, as life is action and passion, it is required of a man that he should share the passion and action of his time at peril of being judged not to have lived
The ultimate good desired is better reached by free trade in ideas [and] the best test of truth is the power of the thought to get itself accepted in the competition of the market.
I find the great thing in this world is not so much where we stand, as in what direction we are moving -- we must sail sometimes with the wind and sometimes against it -- but we must sail, and not drift, nor lie at anchor.