A.T. Robertson Commentary 2 Corinthians 5:13

"For whether we are beside ourselves, it is unto God; or whether we are of sober mind, it is unto you." — 2 Corinthians 5:13 (ASV)

Whether we are beside ourselves (ειτε εξεστημεν). Second aorist active indicative of εξιστημ, old verb, here to stand out of oneself (intransitive) from εκστασις, ecstasy, comes as in Mr 5:42. It is literary plural, for Paul is referring only to himself. See on 1:6 for ειτε-- ειτε. It is a condition of the first class and Paul assumes as true the charge that he was crazy (if I was crazy) for the sake of argument. Festus made it later (Acts 26:24). He spoke with tongues (1 Corinthians 14:18) and had visions (2 Corinthians 12:1–6) which probably the Judaizers used against him. A like charge was made against Jesus . People often accuse those whom they dislike with being a bit off.