Augustine, Confessions §aug_conf_10_024: What, when I name forgetfulness, and withal recognise what I name?

What, when I name forgetfulness, and withal recognise what I name? whence should I recognise it, did I not remember it? I speak not of the sound of the name, but of the thing which it signifies: which if I had forgotten, I could not recognise what that sound signifies. When then I remember memory, memory itself is, through itself, present with itself: but when I remember forgetfulness, there are present both memory and forgetfulness; memory whereby I remember, forgetfulness which I remember. But what is forgetfulness, but the privation of memory? How then is it present that I remember it, since when present I cannot remember? But if what we remember we hold it in memory, yet, unless we did remember forgetfulness, we could never at the hearing of the name recognise the thing thereby signified, then forgetfulness is retained by memory. Present then it is, that we forget not, and being so, we forget. It is to be understood from this that forgetfulness when we remember it, is not present to the memory by itself but by its image: because if it were present by itself, it would not cause us to remember, but to forget. Who now shall search out this? who shall comprehend how it is?