Absolutes?

what do you think about this:

"The Absolute, the Holy-itself, transcends and judges every religion. The ultimate in being and meaning cannot be limited, cannot be caught in any particular religion, in any particular sacred place or by any particular sacred action.But even this statement, that God cannot be caught in any particular religion, could have been made only on the basis of a particular religion, a religion able to transcend its own particularity and, because it can do this, having perhaps a critical power in relation to other religions." -Paul Tillich

Can Christianity be such a religion? (keep in mind 'critical' is a used in a neutral sense here)