Cicero, De Finibus
5.18.48 (tr. H. Rackham):
So great is our innate love of learning and of knowledge, that no one can doubt that man's nature is strongly attracted to these things even without the lure of any profit. Do we notice how children cannot be deterred even by punishment from studying and inquiring into the world around them? Drive them away, and back they come. They delight in knowing things; they are eager to impart their knowledge to others; pageants, games and shows of that sort hold them spell-bound, and they will even endure hunger and thirst so as to be able to see them. Again, take persons who delight in the liberal arts and studies; do we not see them careless of health or business, patiently enduring any inconvenience when under the spell of learning and of science, and repaid for endless toil and trouble by the pleasure they derive from acquiring knowledge?
tantus est igitur innatus in nobis cognitionis amor et scientiae ut nemo dubitare possit quin ad eas res hominum natura nullo emolumento invitata rapiatur. videmusne ut pueri ne verberibus quidem a contemplandis rebus perquirendisque deterreantur? ut pulsi recurrant? ut aliquid scire se gaudeant? ut id aliis narrare gestiant? ut pompa, ludis atque eiusmodi spectaculis teneantur ob eamque rem vel famem et sitim perferant? quid vero? qui ingenuis studiis atque artibus delectantur, nonne videmus eos nec valetudinis nec rei familiaris habere rationem omniaque perpeti ipsa cognitione et scientia captos et cum maximis curis et laboribus compensare eam quam ex discendo capiant voluptatem?