Modesto tamen et circumspecto iudicio de tantis viris pronuntiandum est, ne, quod plerisque accidit, damnent quae non intellegunt.
Notes from Wikiquote
H. E. Butler's translation | But modesty and circumspection are required in pronouncing judgment on such great men, since there is always the risk of falling into the common fault of condemning what one does not understand. | Book X, Chapter I, 26 | Rev. John Selby Watson's translation | Yet students must pronounce with diffidence and circumspection on the merits of such illustrious characters, lest, as is the case with many, they condemn what they do not understand. | Note: The Latin for "They condemn what they do not understand" is Damnant quod non intellegunt. (Damnent quae non intellegunt, as in the original text, is in the subjunctive mood.