I am not mad, most noble Festus. — There is something characteristic in the union of a calm protest with the courtesy which gives to rulers the honour which is their due. Comp. the use of the same word by Tertullus (Acts 24:3). The painful experience of Acts 23:3 had, we may well believe, taught the Apostle to control his natural impulses, and to keep watch over his lips, so that no unguarded utterance might escape from them.
The words of truth and soberness. — The latter word was one of the favourite terms of Greek ethical writers, as having a higher meaning than the “temperance” of Acts 24:25, to express the perfect harmony of impulses and reason (Aristot. Eth. Nicom. iii. 10). Here it is contrasted with the “madness” of which Festus had spoken, looking, as he did, on the Apostle as an enthusiastic dreamer. There was doubtless a deep-lying enthusiasm in his character, but it was an enthusiasm which had its root not in madness, but in truth.