I am having trouble understanding this. For example, say I have this: [positive point charge] [A][neutral conducting sphere] [...infinity] I know the point charge will create a field radially outward. But now I'm thinking of a test charge being brought in from infinity. If the sphere was not there, point A would obviously have a higher potential than point B. But somehow the conducting sphere being there would allow A to have the same potential as B. I do not understand this.