Spurgeon continues:
"But if you do want to answer them, do it humbly by saying, “Well, you may be right and I may be mistaken, but yet I think I can say, ‘One thing I know, that whereas I was blind, now I see.’” And I have known them to sometimes go to the length of saying if we don’t hold all their points of Doctrine and go the whole 18 ounces to the pound, as they do—if we are content with 16 and keep to God’s weights and God’s measures—“Ah, those people cannot be truly converted Christians, they are not so high in Doctrine as we are.” Well, we can answer them with this, “One thing I know, that whereas I was blind, now I see.”"
But of course, this doesn't have any application to anybody here, since we aren't those high-doctrine "Keswick people".