Gandalf Vs. The Witch King

[Essex]

Yes, it was Merry's blade. The blade was imbued with the power of its anonymous maker, which was power enough to undo the protective power over the W-K. How much part Providence played in these circumstances is a pretty wide-open discussion.

You're missing the point entirely. The reason why the Witch King fell (and therefore Middle-earth was saved) was that his arrogance (or shortsightedness perhaps) caused his downfall in the end, exactly the same way as his Master.

As Merry says later on, the WK chose to ignore (or at least OVERLOOK) the little hobbit lying on the floor, thinking him of no import whatsoever. If it was, say, Eomer standing there with the Blade, then he would not have been able to defeat the Witch King as he would have been an advesary the WK would have swatted aside. Therefore it is EXACTLY BECAUSE Merry was an insignificant, weak hobbit, that he was able to assist in helping Frodo and Sam complete their Quest.

Not JUST the Blade. It needed a 'weak' being to help defeat the Strong.

PS - I agree exactly what Alatar said above - My point was to show that the Underdog CAN win in a fight. Whether it was David vs Goliath which you have countered, or Hereford beating Newcastle in the FA Cup (I'd love to see you explain that one away to God) - it is NOT a matter of the Mightiest always winning every battle. If that was the case then I could think of a war or two that both our countries are in we should have been home from quite a while ago!