There is a class of people wanting to be called philosophers, who are said to have produced many books actually in Latin. For my part I don’t despise them — I’ve never read them. But since those selfsame writers proclaim that what they write is neither systematic nor properly subdivided nor correct nor polished in style, I pass by reading what would bring no pleasure.

[Est enim quoddam genus eorum qui se philosophos appellari volunt, quorum dicuntur esse Latini sane multi libri; quos non contemno equidem, quippe quos numquam legerim; sed quia profitentur ipsi illi qui eos scribunt se neque distincte neque distribute neque eleganter neque ornate scribere, lectionem sine ulla delectatione neglego.]

Marcus Tullius Cicero (106-43 BC) Roman orator, statesman, philosopher

Tusculan Disputations [Tusculanae Disputationes], Book 2, ch. 3 (2.3) / sec. 7 (45 BC) [tr. Douglas (1990)]
    (Source)

(Source (Latin)). Alternate translations:

For there is a certain Set of such as assume to themselves the name of Philosophers, who are said to have Books enough in Latin, which I do not despise, for I have never read them; but because the Authors profess themselves, that they write neither with distinction of Terms, nor distribution of Parts, nor elegancy of Language, nor any Ornaments; I neglect to give that reading which is no ways delightful
[tr. Wase (1643)]

For there is a farther certain tribe who would willingly be called philosophers, whose books in our language are said to be numerous, which I do not despise, for indeed I never read the: but because the authors themselves declare that they write without any regularity or method, without elegance or ornament: I do not choose to read what is so void of entertainment.
[tr. Main (1824)]

For there is a certain race, who wish to be called philosophers, whose Latin books, indeed, are said to be numerous, which I have no contempt for, really, because I never read them; but, since their authors themselves profess to write without either order or method, ornament or elegance, I neglect a reading which affords me no delight.
[tr. Otis (1839)]

For there is a certain class of them who would willingly be called philosophers, whose books in our language are said to be numerous, and which I do not despise, for indeed I never read them: but still because the authors themselves declare that they write without any regularity, or method, or elegance, or ornament, I do not care to read what must be so void of entertainment.
[tr. Yonge (1853)]

There is, indeed, a certain class of men who want to be called philosophers, who are said to have written many Latin books, which I do not despise, because I have never read them; but inasmuch as their authors profess to write with neither precision, nor system, nor elegance, nor ornament, I omit reading what can give me no pleasure.
[tr. Peabody (1886)]

There is a certain class of authors, who wish to be called philosophers, and who have apparently published many books in Latin. I do not, indeed, condemn them, because I never read them, but because they themselves confess that they have not written their books clearly or in a well-arranged manner, nor elegantly or with any ornament. I avoid the sort of reading which offers no enjoyment.
[tr. @sentantiq (2015)]

There exists a class of men who lay claim to the title of philosophers and are said to be authors of a great many books in Latin. These I personally do not despise, for the reason that I have never read them; but as the writers of these books on their own admission avoid in what they write a systematic approach, due subdivision, correctness, or a polished style. I have no interest in reading what brings no pleasure.
[tr. Davie (2017)]