MARCUS: There is naturally in our minds a quite insatiable longing to discover truth.

[Natura inest in mentibus nostris insatiabilis quaedam cupiditas veri.]

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

Tusculan Disputations [Tusculanae Disputationes], Book 1, ch. 19 (1.19.) / sec. 44 (1.44) (45 BC) [tr. Douglas (1985)]
    (Source)

On how the soul, after death, will find happiness in contemplation of the universe.

(Source (Latin)). Other translations:

Our minds have naturally inplanted in them, an insatiable longing to come at the sight of Truth.
[tr. Wase (1643)]

There is naturally in our minds a certain insatiable desire of seeing truth.
[tr. Main (1824)]

By nature there exists in our minds a sort of insatiable thirst of seeing the truth.
[tr. Otis (1839)]

There is naturally in our minds a certain insatiable desire to know the truth.
[tr. Yonge (1853)]

There is in our minds an insatiable desire to behold the truth.
[tr. Peabody (1886)]

There is naturally implanted in all minds the insatiable desire of being face to face with what is true.
[tr. Black (1889)]

Nature has implanted in our minds a certain insatiable desire to behold the truth.
[ed. Harbottle (1897)]

Our minds by nature have an insatiable longing to see the truth.
[tr. Habinek (1996)]

There exists naturally in our minds a positively insatiable longing to discover the truth.
[tr. Davie (2017)]