Out of myself. This formula occurs only here. The usual expression is ἀπ' ἐμαυτοῦ. Ἁπό, from, as distinguished from ἐκ, out of, marks rather the point of departure, while ἐκ, including this idea, emphasizes the point of departure as the living and impelling source of that which issues forth. In Joh 7:17, we read, “whether it be out of God (ἐκ τοῦ Θεοῦ), or whether I speak from myself (ἀπ' ἐμαυτοῦ).”
The best texts read δέδεκεν, the perfect tense, hath given, the result of the gift still abiding. So Rev.
Say - speak (εἴπω - λαλήσω)
The former relating to the substance, and the latter to the form of Jesus' utterances.