It is pretty clear that they are ineffective in stopping the course of thought at present, but they have not always been so in the past and we cannot be sure that they will not be so in the future.
-- John Desmond Bernal
   
John Desmond Bernal   Name:
John Desmond Bernal
Type:
Scientist
Nationality:
Irish
Birth:
May 10, 1901
Death:
September 15, 1971
https://www.nutquote.com/quote/John_Desmond_Bernal