The essence of the liberal outlook lies not in what opinions are held, but in how they are held; instead of being held dogmatically, they are held tentatively, and with a consciousness that new evidence may at any moment lead to their abandonment.

Bertrand Russell (1872 CE-1970 CE), Bertrand Arthur William Russell, 3rd Earl Russell OM FRS was a British philosopher. As an academic, he worked in philosophy, mathematics, and logic.