If thou workest at that which is before thee, following right reason seriously, vigorously, calmly, without allowing anything else to distract thee, but keeping thy divine part pure, as if thou shouldst be bound to give it back immediately; if thou holdest to this, expecting nothing, fearing nothing, but satisfied with thy present activity according to nature, and with heroic truth in every word and sound which thou utterest, thou wilt live happy. And there is no man who is able to prevent this.
Thou canst pass thy life in an equable flow of happiness, if thou canst go by the right way, and think and act in the right way. These two things are common both to the soul of God and to the soul of man, and to the soul of every rational being, not to be hindered by another; and to hold good to consist in the disposition to justice and the practice of it, and in this to let thy desire find its termination.
Eudaemonia (happiness) is a good daemon, or a good thing. What then art thou doing here, O imagination? Go away, I entreat thee by the gods, as thou didst come, for I want thee not. But thou art come according to thy old fashion. I am not angry with thee: only go away.
This reflection also tends to the removal of the desire of empty fame, that it is no longer in thy power to have lived the whole of thy life, or at least thy life from thy youth upwards, like a philosopher; but both to many others and to thyself it is plain that thou art far from philosophy. Thou hast fallen into disorder then, so that it is no longer easy for thee to get the reputation of a philosopher; and thy plan of life also opposes it. If then thou hast truly seen where the matter lies, throw away the thought, How thou shalt seem to others, and be content if thou shalt live the rest of thy life in such wise as thy nature wills. Observe then what it wills, and let nothing else distract thee; for thou hast had experience of many wanderings without having found happiness anywhere, not in syllogisms, nor in wealth, nor in reputation, nor in enjoyment, nor anywhere. Where is it then? In doing what man's nature requires. How then shall a man do this? If he has principles from which come his affects and his acts. What principles? Those which relate to good and bad: the belief that there is nothing good for man, which does not make him just, temperate, manly, free; and that there is nothing bad, which does not do the contrary to what has been mentioned.