“I do not pretend to know what many ignorant men are sure of.”  ~Clarence S. Darrow

 

“Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.”  ~Bertrand Russell

 

“The educated in [the critical habit of thought] . . . are slow to believe.  They can hold things as possible or probable in all degrees,…