My Father and I are one, not only in counsel and will, (as 1 Thessalonians 17:11,22, and believers are said to be of one heart, Acts 4:32), but in nature, power, and essence; for it is plain that our Saviour here ascribes the preservation of his sheep, not to the will, but to the power of his Father: None is able to pluck them out of my Father's hand. And it is plain by what follows, that the Jews thus understood our Saviour. Some eminent protestant interpreters expound this of a oneness in consent and will, doing the same things, and driving the same design, both agreeing to preserve the sheep unto eternal life; but (with all respect unto them) I think the context implies more, though this be not excluded.
Related Commentaries of John 10:30
John 10:30
30 I and my Father are one.