But there are tokens supplied by nature, still clearer, or, I may say, entirely evident and indubitable,—more especially, indeed, in man, but also in every animal,—that the mind is always desirous to be doing something, and can in no condition endure perpetual rest. It is easy to see this in the earliest age of children; for although I fear that I may appear prolix on this subject, still all the ancient philosophers, and especially those of our own country, have recourse to the cradle for illustrations, because they think that in childhood they can most easily detect the will of nature. We see, then, that even infants cannot rest; but, when they have advanced a little, then they are delighted with even laborious sports, so that they cannot be deterred from them even by beating: and that desire for action grows with their growth. Therefore, we should not like to have the slumber of Endymion given to us, not even if we expected to enjoy the most delicious dreams; and if it were, we should think it like death. Moreover, we see that even the most indolent men, men of a singular worthlessness, are still always in motion both in mind and body; and when they are not hindered by some unavoidable circumstance, that they demand a dice-box or some game of some kind, or conversation; and, as they have none of the liberal delights of learning, seek circles and assemblies. Even beasts, which we shut up for our ownamusement, though they are better fed than if they were free, still do not willingly endure being imprisoned, but pine for the free and unrestrained movements given to them by nature. Therefore, in proportion as every one is born and prepared for the best objects, he would be unwilling to live at all if, being excluded from action, he were able only to enjoy the most abundant pleasures.
For men wish either to do something as individuals, or those who have loftier souls undertake the affairs of the state, and devote themselves to the attainment of honours and commands, or else wholly addict themselves to the study of learning; in which path of life they are so far from getting pleasures, that they even endure care, anxiety and sleeplessness, enjoying only that most excellent portion of man which may be accounted divine in us, I mean the acuteness of the genius and intellect, and they neither seek for pleasure nor shun labour. Nor do they intermit either their admiration of the discoveries of the ancients, or their search after new ones; and, as they are insatiable in their pursuit of such, they forget everything else, and admit no low or grovelling thoughts; and such great power is there in those studies, that we see even those who have proposed to themselves other chief goods, which they measure by advantage or pleasure, still devote their lives to the investigation of things, and to the explanation of the mysteries of nature.