Quote by Russell, Bertrand
"Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true."
More from Russell, Bertrand
"Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric."
"The only thing that will redeem mankind is cooperation."
"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."
"Fear is the main source of superstition, and one of the main sources of cruelty."