Every other sect supposes itself in possession of the truth,...

Every other sect supposes itself in possession of the truth, and that those who differ are so far in the wrong. Like a man traveling in foggy weather they see those at a distance before them wrapped up in a fog, as well as those behind them, and also people in the fields on each side; but near them, all appears clear, though in truth they are as much in the fog as any of them.