They who wonder at my being a follower of this sect in particular may find a satisfactory answer in my four books of Academical Questions. But I deny that I have undertaken the protection of what is neglected and forsaken; for the opinions of men do not die with them, though they may perhaps want the author's explanation. This manner of philosophizing, of disputing all things and assuming nothing certainly, was begun by Socrates, revived by Arcesilaus, confirmed by Carneades, and has descended, with all its power, even to the present age; but I am informed that it is now almost exploded even in Greece. However, I do not impute that to any fault in the institution of the Academy, but to the negligence of mankind. If it is difficult to know all the doctrines of any one sect, how much more is it to know those of every sect! which, however, must necessarily be known to those who resolve, for the sake of discovering truth, to dispute for or against all philosophers without partiality.
I do not profess myself to be master of this difficult and noble faculty; but I do assert that I have endeavored to make myself so; and it is impossible that they who choose this manner of philosophizing should not meet at least with something worthy their pursuit. I have spoken more fully on this head in another place. But as some are too slow of apprehension, and some too careless, men stand in perpetual need of caution. 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,