Originally Posted by Mansun

I did not say Gandalf would definately defeat the WK, even though he could if he was not restrained of his full power. I meant rather that the WK could not defeat Gandalf. The Wizard's role in the confrontation was to hold off the WK. Gandalf would have only revealed his true power if he had really been forced to and had no choice, as with his battle against a foe of his equal, the Balrog of Morgoth. Even against the Balrog, the Wizard tried to avoid a direct battle by breaking the bridge at the feet of his enemy. He tried instead to hold off the Balrog.