Quote by Bertrand Russell
"The value of a scientific principle lies not in its truth, but in its utility."
More from Bertrand Russell
"Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric."
"The fundamental cause of trouble in the world today is that the stupid are cocksure while the intelligent are full of doubt."
"What is wanted is not the will to believe, but the wish to find out, which is the exact opposite of the will to believe."
"The only thing that will redeem mankind is cooperation."