Intellectual Integrity

I mean by intellectual integrity the habit of deciding vexed questions in accordance with the evidence, or of leaving them undecided where the evidence is inconclusive.  This virtue, though it is underestimated by almost all adherents of any system of dogma, is to my mind of the very greatest social importance and far more likely to benefit the world than Christianity or any other system of organized beliefs.

-- Bertrand Arthur William Russell, 3rd Earl Russell (1872 - 1970), British philosopher, logician, mathematician, historian, and social critic, The Basic Writings of Bertrand Russell, 1903-1959 (1992), p. 598