If We Are Uncritical

If we are uncritical we shall always find what we want: we shall look for, and find, confirmations, and we shall look away from, and not see, whatever might be dangerous to our pet theories.  In this way it is only too easy to obtain what appears to be overwhelming evidence in favor of a theory which, if approached critically, would have been refuted.

-- Sir Karl Raimund Popper (1902 - 1994), Austrian and British philosopher, and professor at the London School of Economics, The Poverty of Historicism (1957) Ch. 29 The Unity of Method