Sorcery

[Boromir88]

I agree, Mansun. The Witch King was the leader of the armies, whereas the Mouth of Sauron was merely just a delegate of the Eye, regardless of his power.~ninja

I disagree with the term 'merely a delegate.' The Mouth of Sauron was his herald, a very high position within Mordor. Take Elrond for instance who was Gil-galad's herald during the War of the Last Alliance...and Elrond could have taken up the Noldor Kingship after Gil-galad's death had he wanted to. The Mouth clearly outranks the Witch-King...again the Witch-King may be more powerful but the Mouth of Sauron is higher up in the echelons.

I would also take the statements that The Mouth knew more of the mind of Sauron than anyone else, and that he was more cruel than any orc, as to mean that he would have been very capable at doing what Sauron wanted him for...which was very likely that Sauron would have place the Mouth to rule in Orthanc:

'But they [Men] shall help to rebuild Isengard which they have wantonly destroyed, and that shall be Sauron's, and there his lieutenant shall dwell: not Saruman, but one more worthy of trust.'~The Black Gate Opens

So, the Mouth wasn't merely this delegate or ambassador of Sauron. He was his Lieutenant of Barad-dur, his herald, he was second only to Sauron, and Sauron was going to place him in Isengard had his victory come to pass.

To actually address the thread now that I've gotten way to off track...

Raynor, that is a good quote explaining Aragorn, but I still feel that it's not always the case for Men. As I got the impression that the Mouth of Sauron had learned sorcery, it wasn't something that he just had the power to do.

Saurreg, I can't say anymore than this...no matter who's making an oath to whom, I got the impression that there was a power in the words, and to break the oath would mean the person has to face some sort of consequences. Doesn't matter if an Elf is making one, a Maiar, or a hobbit...etc, to make an oath there is some sort of binding power and it doesn't have anything to do with some power of the individual.

Let's take the Oath Eorl made to Cirion, both were men, neither that we know of have any special magical abilities...but still forever Gondor and Rohan were bound by this oath. Cirion gave Eorl land to rule, and in return Eorl (and his descendants) would have to answer to Gondor's call of aid. Theoden is fully aware of this oath, and is probably the main propelling force as far as why he goes to Gondor's call, of course he's also a good guy....but who knows what consequences would have faced Theoden and his people had he not fulfilled his part of the oath.