It also proves a fertile source of troubles if you take pains to conceal your feelings and never show yourself to any one undisguised, but, as many men do, live an artificial life, in order to impose upon others: for the constant watching of himself becomes a torment to a man, and he dreads being caught doing something at variance with his usual habits, and, indeed, we never can be at our ease if we imagine that everyone who looks at us is weighing our real value: for many things occur which strip people of their disguise, however reluctantly they may part with it, and even if all this trouble about oneself is successful, still life is neither happy nor safe when one always has to wear a mask. But what pleasure there is in that honest straight-forwardness which is its own ornament, and which conceals no part of its character? Yet even this life, which hides nothing from any one runs some risk of being despised; for there are people who disdain whatever they come close to: but there is no danger of virtue's becoming contemptible when she is brought near our eyes, and it is better to be scorned for one's simplicity than to bear the burden of unceasing hypocrisy. Still, we must observe moderation in this matter, for there is a great difference between living simply and living slovenly. Moreover, we ought to retire a great deal into ourselves: for association with persons unlike ourselves upsets all that we had arranged, rouses the passions which were at rest, and rubs into a sore any weak or imperfectly healed place in our minds. Nevertheless we ought to mix up these two things, and to pass our lives alternately in solitude and among throngs of people; for the former will make us long for the society of mankind, the latter for that of ourselves, and the one will counteract the other: solitude will cure us when we are sick of crowds, and crowds will cure us when we are sick of solitude. Neither ought we always to keep the mind strained to the same pitch, but it ought sometimes to be relaxed by amusement. Socrates did not blush to play with little boys, Cato used to refresh his mind with wine after he had wearied it with application to affairs of state, and Scipio would move his triumphal and soldierly limbs to the sound of music, not with a feeble and halting gait, as is the fashion now-a-days, when we sway in our very walk with more than womanly weakness, but dancing as men were wont in the days of old on sportive and festal occasions, with manly bounds, thinking it no harm to be seen so doing even by their enemies. Men's minds ought to have relaxation: they rise up better and more vigorous after rest. We must not force crops from rich fields, for an unbroken course of heavy crops will soon exhaust their fertility, and so also the liveliness of our minds will be destroyed by unceasing labour, but they will recover their strength after a short period of rest and relief: for continuous toil produces a sort of numbness and sluggishness. Men would not be so eager for this, if play and amusement did not possess natural attractions for them, although constant indulgence in them takes away all gravity and all strength from the mind: for sleep, also, is necessary for our refreshment, yet if you prolong it for days and nights together it will become death. There is a great difference between slackening your hold of a thing and letting it go. The founders of our laws appointed festivals, in order that men might be publicly encouraged to be cheerful, and they thought it necessary to vary our labours with amusements, and, as I said before, some great men have been wont to give themselves a certain number of holidays in every month, and some divided every day into play-time and work-time.

Thus, I remember that great orator Asinius Pollio would not attend to any business after the tenth hour: he would not even read letters after that time for fear some new trouble should arise, but in those two hours used to get rid of the weariness which he had contracted during the whole day. Some rest in the middle of the day, and reserve some light occupation for the afternoon. Our ancestors, too, forbade any new motion to be made in the Senate after the tenth hour. Soldiers divide their watches, and those who have just returned from active service are allowed to sleep the whole night undisturbed. We must humour our minds and grant them rest from time to time, which acts upon them like food, and restores their strength. It does good also to take walks out of doors, that our spirits may be raised and refreshed by the open air and fresh breeze: sometimes we gain strength by driving in a carriage, by travel, by change of air, or by social meals and a more generous allowance of wine: at times we ought to drink even to intoxication, not so as to drown, but merely to dip ourselves in wine: for wine washes away troubles and dislodges them from the depths of the mind, and acts as a remedy to sorrow as it does to some diseases. The inventor of wine is called Liber, not from the licence which he gives to our tongues, but because he liberates the mind from the bondage of cares, and emancipates it, animates it, and renders it more daring in all that it attempts. Yet moderation is wholesome both in freedom and in wine. It is believed that Solon and Arcesilaus used to drink deep. Cato is reproached with drunkenness: but whoever casts this in his teeth will find it easier to turn his reproach into a commendation than to prove that Cato did anything wrong: however, we ought not to do it often, for fear the mind should contract evil habits, though it ought sometimes to be forced into frolic and frankness, and to cast off dull sobriety for a while. If we believe the Greek poet, "it is sometimes pleasant to be mad"; again, Plato always knocked in vain at the door of poetry when he was sober; or, if we trust Aristotle, no great genius has ever been without a touch of insanity. The mind cannot use lofty language, above that of the common herd, unless it be excited. When it has spurned aside the commonplace environments of custom, and rises sublime, instinct with sacred fire, then alone can it chant a song too grand for mortal lips: as long as it continues to dwell within itself it cannot rise to any pitch of splendour: it must break away from the beaten track, and lash itself to frenzy, till it gnaws the curb and rushes away bearing up its rider to heights whither it would fear to climb when alone.

I have now, my beloved Serenus, given you an account of what things can preserve peace of mind, what things can restore it to us, what can arrest the vices which secretly undermine it: yet be assured, that none of these is strong enough to enable us to retain so fleeting a blessing, unless we watch over our vacillating mind with intense and unremitting care.