Nature has not so mingled the intelligence with the composition of the body, as not to have allowed thee the power of circumscribing thyself and of bringing under subjection to thyself all that is thy own; for it is very possible to be a divine man and to be recognised as such by no one. Always bear this in mind; and another thing too, that very little indeed is necessary for living a happy life. And because thou hast despaired of becoming a dialectician and skilled in the knowledge of nature, do not for this reason renounce the hope of being both free and modest and social and obedient to God.
Do not disturb thyself by thinking of the whole of thy life. Let not thy thoughts at once embrace all the various troubles which thou mayest expect to befall thee: but on every occasion ask thyself, What is there in this which is intolerable and past bearing? For thou wilt be ashamed to confess. In the next place remember that neither the future nor the past pains thee, but only the present. But this is reduced to a very little, if thou only circumscribest it, and chidest thy mind, if it is unable to hold out against even this.