10.21.30   But is it so, as one remembers Carthage who hath seen it? No. For a happy life is not seen with the eye, because it is not a body. As we remember numbers then? No. For these, he that hath in his knowledge, seeks not further to attain unto; but a happy life we have in our knowledge, and therefore love it, and yet still desire to attain it, that we may be happy. As we remember eloquence then? No. For although upon hearing this name also, some call to mind the thing, who still are not yet eloquent, and many who desire to be so, whence it appears that it is in their knowledge; yet these have by their bodily senses observed others to be eloquent, and been delighted, and desire to be the like (though indeed they would not be delighted but for some inward knowledge thereof, nor wish to be the like, unless they were thus delighted); whereas a happy life, we do by no bodily sense experience in others. As then we remember joy? Perchance; for my joy I remember, even when sad, as a happy life, when unhappy; nor did I ever with bodily sense see, hear, smell, taste, or touch my joy; but I experienced it in my mind, when I rejoiced; and the knowledge of it clave to my memory, so that I can recall it with disgust sometimes, at others with longing, according to the nature of the things, wherein I remember myself to have joyed. For even from foul things have I been immersed in a sort of joy; which now recalling, I detest and execrate; otherwhiles in good and honest things, which I recall with longing, although perchance no longer present; and therefore with sadness I recall former joy.