written in the prophets - in Isa 54:13; Jer 31:33, Jer 31:34; other similar passages may also have been in view. Our Lord thus falls back upon Scripture authority for this seemingly hard saying.
all taught of God - not by external revelation merely, but by internal illumination, corresponding to the “drawing” of Joh 6:44.
Every man therefore, etc. - that is, who hath been thus efficaciously taught of Him.
cometh unto me - with absolute certainty, yet in the sense above given of “drawing”; that is, “As none can come to Me but as divinely drawn, so none thus drawn shall fail to come.”