John 15:21 - Matthew Poole's English Annotations on the Holy Bible

For my name's sake here signifies no more than for my sake, as Matthew 10:22; for your preaching, owning, and professing me and my gospel. And this they would not do, if they had any true knowledge of faith in or love for him that sent me: for knowing, (as hath been often said), in holy writ, and particularly in this Gospel, signifieth not the bare comprehension of the object by our understanding, but such a comprehension of it as is operative and efficacious to the bringing forth of all such effects as are proper to such a knowledge and comprehension. So as this text containeth two arguments more to arm them against the hatred of the world: the first, from the honourableness of the cause, for Christ's name's sake; the second, from the ignorance and blindness of the persons.