Cogito cogito ergo cogito sum -- "I think that I think, therefore I think that I am;" as close an approach to certainty as any philosopher has yet made.
Ambrose BierceMISCREANT, n. A person of the highest degree of unworth. Etymologically, the word means unbeliever, and its present signification may be regarded as theology's noblest contribution to the development of our language.
Ambrose Bierce