I think all that is necessary to be a christian is to believe that Jesus Christ was the son of God and that he died on the cross for our sins and was resurrected 3 days later as testament that he had conquered death. But even that is subjective because Jordan Peterson considers himself a christian and he is agnostic towards the resurrection and I assume his tie to christianity is more in line with the symbolic meaning of Christ's death and resurrection rather than a belief that Jesus literally was raised from the dead.
But your individuality and your present need will be swept away by change,
and what you now ardently desire will one day become the object of abhorrence.
~ Schiller - 'Psychological Types'
