
Men seek retreats for themselves, houses in the country, at the seashore, and in the mountains; and you tend to desire such things very much. But this is a characteristic of the most common sort of men, for it is in your power whenever you will to choose to retreat into yourself. For nowhere either with more quiet or more freedom from trouble does a man retreat than into his own soul, particularly when he has within him such thoughts that by looking into them he is immediately perfectly tranquil; and I affirm that tranquillity is nothing other than the proper ordering of the mind.