Every now and then a man’s mind is stretched by a new idea or sensation, and never shrinks back to its former dimensions.

Oliver Wendell Holmes, Sr. (1809-1894) American poet, essayist, scholar

Article (1858-09), “The Autocrat of the Breakfast-Table,” Atlantic Monthly
    (Source)

Collected in The Autocrat of the Breakfast Table, ch. 11 (1858).