Thanks, Clay, that's helpful. I would not have said that a constative aorist describes a state - I thought that it could be described as viewing an action, or series of actions, summed up as a whole. So here, if he had been ecstatic on occasions, then in English we might use a perfect: 'if I have been ecstatic..'.
If Paul wanted to say, 'Whether I am out of my mind.. whether I am in my right mind', ie viewing them as two present alternatives, is there any reason why he would not have used two presents?
I note from Harris's footnotes, that there is much more support (n.34) for the preterite view. Looking up Burton, he gives this as a (rare) instance of an aorist having the sense of a Greek Perfect. So then we might have 'if I have become mad/ecstatic'.
The argument for this Greek Perfect sense in this verse seems to be based largely on Mark 3.21:
καὶ ἀκούσαντες οἱ παρ’ αὐτοῦ ἐξῆλθον κρατῆσαι αὐτόν· ἔλεγον γὰρ ὅτι ἐξέστη.
Moulton says that 'English .. demands the perfect, "he has gone out of his mind." '
But it's only a Greek Perfect, as I understand it, if the focus is on the resulting state: are they really saying that he is now out of his mind, or is the emphasis on his going out of his mind. If the latter then can this not be a fairly normal aorist? And if so, is there any reason not to translate 2 Corinthians 5.13 normally?
For the so-called gnomic aorist, Moulton (Prolog. 135) cites Goodwin, who says that it and the gnomic perfect:
give a more vivid statement of general truths, by employing a distinct case or several distinct cases in the past to represent (as it were) all possible cases, and implying that what has occurred is likely to occur again under similar circumstances.
But that sounds to me like the verb itself has its normal force, and the timeless sense comes from the sentence as a whole. For example:
ἀνέτειλεν γὰρ ὁ ἥλιος σὺν τῷ καύσωνι καὶ ἐξήρανεν τὸν χόρτον, καὶ τὸ ἄνθος αὐτοῦ ἐξέπεσεν καὶ ἡ εὐπρέπεια τοῦ προσώπου αὐτοῦ ἀπώλετο· οὕτως καὶ ὁ πλούσιος ἐν ταῖς πορείαις αὐτοῦ μαρανθήσεται. [James 1.11]
Even in English, if one just says, 'for the sun rose with its burning heat, and the grass withered etc. .. so the rich also shall fade away', this makes perfectly good sense - one pictures it in a way as a single event, but because one knows that it happens all the time, the thought acquires a timeless quality.
Andrew