Augustine of Hippo on Knowledge

“To wisdom belongs the intellectual apprehension of things eternal; to knowledge, the rational apprehension of things temporal.”

“There is another form of temptation, more complex in its peril. … It originates in an appetite for knowledge. … From this malady of curiosity are all those strange sights exhibited in the theatre. Hence do we proceed to search out the secret powers of nature (which is beside our end), which to know profits not, and wherein men desire nothing but to know.”

“Without any delusive representation of images or phantasms, I am most certain that I am, and that I know and delight in this. In respect of these truths, I am not at all afraid of the arguments of the Academicians, who say, What if you are deceived? For if I am deceived, I am. For he who is not, cannot be deceived; and if I am deceived, by this same token I am. And since I am if I am deceived, how am I deceived in believing that I am? for it is certain that I am if I am deceived. Since, therefore, I, the person deceived, should be, even if I were deceived, certainly I am not deceived in this knowledge that I am.”