God also bearing them witness, both with signs and wonders, and with divers miracles, and gifts of the Holy Ghost, according to his own will? God also bearing them witness - He did not leave the confirmation of these great truths to the testimony of men; he bore his own testimony to them by signs, wonders, various miracles, and distributions of the Holy Ghost, Πνευματος 'Αγιου μερισμοις. And all these were proved to come from himself; for no man could do those miracles at his own pleasure, but the power to work them was given according to God's own will; or rather, God himself wrought them, in order to accredit the ministry of his servants.
For the meaning of signs, wonders, etc., See the note on Deuteronomy 4:34.