Prayer obtains what it is due to obtain — not what I personally want to obtain, which is different. It is useful that islands of prayer exist in the world, even if they are composed of only one person, or two, or three, or four.
There are many truths that do not have a name. Truths do not need names. But we do. We notice truths with names much more easily than truths we have not yet named, and naming is a way of realizing a truth that we had not noticed before