[165] Moreover, when any one who is engaged in a journey is hungry or thirsty, if he on a sudden sees a fountain or all kinds of trees weighed down with eatable fruits, he is at once filled with a hope of enjoyment, not only before he has either eaten or drunk, but before he has either come near them or gathered of them. And do we then think that we are able to feast on the nourishment of the body before we receive it, but that the food of the mind is not able to render us cheerful beforehand, even when we are on the very point of feasting on it?