Quote by Russell, Bertrand
"What is considered impossible one day may be convention the next."
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."