Cicero's Tusculan Disputations

There are many things in philosophy, my dear Brutus, which are not as yet fully explained to us, and particularly (as you very well know) that most obscure and difficult question concerning the Nature of the Gods, so extremely necessary both towards a knowledge of the human mind and the practice of true religion: concerning which the opinions of men are so various, and so different from each other, as to lead strongly to the inference that ignorance72 is the cause, or origin, of philosophy, and that the Academic philosophers have been prudent in refusing their assent to things uncertain: for what is more unbecoming to a wise man than to judge rashly? or what rashness is so unworthy of the gravity and stability of a philosopher as either to maintain false opinions, or, without the least hesitation, to support and defend what he has not thoroughly examined and does not clearly comprehend?