By Schubert Ogden
...
This seems to me to raise the question, however, whether a Christian may not be well advised to avoid saying to others that they are implicitly Christians in this second sense of the words. That someone's self-understanding is substantially the same as the self-understanding to which Jesus explicitly calls us does not at all mean that they are also formally the same. On the contrary, the whole point of distinguishing, in this second sense, between being implicitly a Christian and being explicitly one is to acknowledge a formal difference. And it is precisely with this formal difference that everything specifically and properly Christian has to do. One is not specifically and properly a Christian solely and simply because one has a certain self-understanding, but only because, or insofar as, one makes use, and so lives as to give others to make use, of certain specific means of coming to that self-understanding and continuing in it. Recognizing, as Christians must, the significance – -- indeed, the decisive significance! – -- of these means, should they not, as a general rule, at least, avoid speaking of anyone as implicitly a Christian except in the first sense of the words?
...
According to many scholars, the witness of the earliest community represented by the so-called Jesus-kerygma was lacking altogether in explicit christology, whence the inference that Jesus' own witness was probably similarly lacking in any explicit christological claim. At the same time, however, scholars commonly say that the sheer fact that certain disciples "followed" Jesus already during his lifetime, and that they continued to bear witness to him even after his crucifixion, implied a claim to the effect that Jesus is of decisive significance for human existence – -- just as Jesus himself is commonly inferred to have implied a claim to the same effect by what he said or implied about the decisive significance of his own witness of faith. But, then, assuming that what constitutes Christianity explicitly as such is some formulation or other of this very claim, and so what I mean by "the constitutive christological assertion," one may say that a member of the earliest Christian community and, quite possibly, Jesus himself could have been, at most, implicitly a Christian. In this sense, however, what one means in saying this is not simply that the self-understanding of such an earliest Christian or of Jesus himself was authentic and that the understanding of existence she or he also had or expressed was true; one means, instead, that what she or he thought, said, or did, although still not explicitly Christian and therefore christological was nonetheless such as to imply the claim for the decisive significance of Jesus that all formulations of the christological assertion are but ways of making explicit.
In sum: to say that someone is implicitly a Christian may be either a specifically Christian way of saying something about a non-Christian – -- namely, that her or his self-understanding is authentic because the understanding of existence it presupposes is true – -- or a way that is not specifically Christian of saying something about someone who is – -- namely, that what she or he thinks, says, and does, although not explicitly christological, nonetheless implies the assertion that all christological formulations properly function to explicate.
...