Titus 3:10

When we think of a heretic, we usually think of someone who holds and propagates views that are contrary to the great fundamental truths of the faith. We think of men like Arius, Montanus, Marcion and Pelagius who lived in the second and third centuries AD.

I do not propose to reject that definition of heretic but to broaden it. A heretic, in the New Testament sense, also includes anyone who obstinately promotes a teaching, even of secondary importance; that causes division in the...