Gandalf (Ian McKellen) shouts this to the Balrog in The Lord of the Rings: The Fellowship of the Ring. It is almost a battle cry, but there is actually much more to it if we consider that ...

changed slightly from the source material's "You cannot pass" — stands out as one of the best Lord of the Rings quotes out there. Of course, that's not the only thing Gandalf says to the Balrog ...