“One of the few certainties in life is that persons of certainty should certainly be avoided.”
“The one unchangeable certainty is that nothing is certain or unchangeable.”
“certain of certain certainties.......”
“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.”
“The person who is certain, and who claims divine warrant for his certainty, belongs now to the infancy of our species.”
“In these matters, the only certainty is that nothing is certain”