MARCUS: And so, whatever that may be which possesses thought, wisdom, life, vitality — it must be of Heaven and divine, and therefore immortal.

[Ita, quicquid est illud, quod sentit, quod sapit, quod vivit, quod viget, caeleste et divinum ob eamque rem aeternum sit necesse est.]

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

Tusculan Disputations [Tusculanae Disputationes], Book 1, ch. 27 (1.27) / sec. 66 (1.66) (45 BC) [tr. Black (1889)]
    (Source)

This passage is actually quoted by Cicero from his now-lost Consolation [Consolatio], written after the death of his daughter. That text survives only in fragments such as this.

(Source (Latin)). Other translations:

Whatever therefore is that Principle which hath Sense, which hath Wisdom, which hath Will, which hath Activity, it is Celestial and Divine, and therefore, must of necessity be eternal.
[tr. Wase (1643)]

Whatever then that is, which thinks, which has understanding, volition, and a principle of life, is heavenly and divine, and on that account must necessarily be eternal.
[tr. Main (1824)]

Therefore, that nature, in us, which thinks, which knows, and is full of life, whatever it may be in itself, is celestial and divine, and necessarily, for that reason, eternal.
[tr. Otis (1839)]

Whatever, then, that is which thinks, and which has understanding, and volition, and a principle of life, is heavenly and divine, and on that account must necessarily be eternal.
[tr. Yonge (1853)]

Thus whatever that is, which feels, which knows, which lives, which has an interior principle of life, is heavenly and divine, and must therefore of necessity be eternal.
[tr. Peabody (1886)]

Whatever that principle is which feels, conceives, lives, and exists, it is heavenly and divine, and therefore must be eternal.
[tr. Taylor/Hunt (1916)]

So whatever it is which has feeling, intelligence, life, and energy is heavenly and divine, and on that account must be eternal.
[tr. Douglas (1985)]

Whatever it is that thinks, knows, lives, and grows must be heavenly, divine, and therefore eternal.
[tr. Habinek (1996)]

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Accordingly whatever it is that has consciousness, life and activity must be heavenly and divine, and for that reason eternal.
[tr. Davie (2017)]