In the OP, dwalin, you spoke of “all the tenets of Christianity”. As the other posters and myself have implied, there is no one “Christianity”, just denominational differences.For those who already profess Christianity I think it boils down to this. If you believe that God, in the Person of Jesus, came to Earth and lived as a human being, then died to redeem you from you from your sins, you will go to Heaven. Such belief is a gift, it comes from the Holy Spirit and can’t be earned by any actions on our part. Good deeds are performed out of gratitude for the gift, one might say, but have no bearing one one’s “eligibility” for Heaven.
Styles of services, rites performed, number of sacrements(if any) and so on, are irrelevant. Different people have different tastes in such matters, so they worship and behave in such a way that their thoughts are channeled into honoring God. I myself prefer a formal, liturgical service(heck, I AM an Episcopalian!), but it’s no better than a wide open charismatic revival.
Some years back there was a mini-series on television, Young Catherine, a rather fictionalized story of the early years of Catherine the Great, of Russia. But one segment impressed me as good writing. When she was worried about changing her faith to Russian Orthodoxy(it would be required of her), a priest quieted her misgivings in this way. I am quoting from memory her, as best I can He asked her “Do you know how a pearl is made?”, and when she said no he replied in this way. “A grain of sand finds it’s way into an oyster. The oyster finds this uncomfortable and begins coating it over with the material that forms the pearl. In the same way the words of our Lord can be uncomfortable, and people coat them over in different ways. But break open the pearl and inside you will find the same perfect grain of sand.”
I like that.