For we are not people who believe that there is nothing whatever which is true; but we say that some falsehoods are so blended with all truths, and have so great a resemblance to them, that there is no certain rule for judging of or assenting to propositions; from which this maxim also follows, that many things are probable, which, though they are not evident to the senses, have still so persuasive and beautiful an aspect that a wise man chooses to direct his conduct by them.
VI.

Now, to free myself from the reproach of partiality, I propose to lay before you the opinions of various philosophers concerning the nature of the Gods, by which means all men may judge which of them are consistent with truth; and if all agree together, or if any one shall be found to have discovered what may be absolutely called truth, I will then give up the Academy as vain and arrogant.

So I may cry out, in the words of Statius, in the Synephebi, Ye Gods, I call upon, require, pray, beseech, entreat, and implore the attention of my countrymen all, both young and old; yet not on so trifling an occasion as when the person in the play complains that, In this city we have discovered a most flagrant iniquity: here is a professed courtesan, who refuses money from her lover; but that they may attend, know, and consider what sentiments they ought to preserve concerning religion, piety, sanctity, ceremonies, faith, oaths, temples, shrines, and solemn sacrifices; what they ought to think of the auspices over which I preside;[78] for all these have relation to the present question.

The manifest disagreement among the most learned on this subject creates doubts in those who imagine they have some certain knowledge of the subject.
Which fact I have often taken notice of elsewhere, and I did so more especially at the discussion that was held at my friend C.Cotta's concerning the immortal Gods, and which was carried on with the greatest care, accuracy, and precision; for coming to him at the time of the Latin holidays,[79] according to his own invitation and message from him, I found him sitting in his study,[80] and in a discourse with C.Velleius, the senator, who was then reputed by the Epicureans the ablest of our countrymen.

Q.Lucilius Balbus was likewise there, a great proficient in the doctrine of the Stoics, and esteemed equal to the most eminent of the Greeks in that part of knowledge.