Thus in all things the greatest pleasures are only narrowly separated from disgust.

[Sic omnibus in rebus, voluptatibus maximis fastidium finitimum est.]

Marcus Tullius Cicero (106-43 BC) Roman orator, statesman, philosopher
De Oratore [On the Orator, On Oratory], Book 3, ch. 25 (3.25) / sec. 100 (55 BC) [tr. Rackham (1942)]
    (Source)

(Source (Latin)). Alternate translations:

Thus, generally speaking, Loathing borders upon the most pleasing Sensations.
[tr. Guthrie (1755)]

Thus, generally speaking, satiety borders upon the most pleasing sensations.
[Source (1808)]

In all other things, loathing still borders upon the most exquisite delights.
[tr. Watson (1860)]

The extremes of gratification and disgust are separated by the finest line of demarcation.
[tr. Calvert (1870)]

In everything we do, all our keenest pleasures end in satiety.
[ed. Harbottle (1906)]

In everything else, then, the greatest pleasure borders on aversion.
[tr. May/Wisse (2001)]