...so you bring sacrifices to the temple, are circumcised and eat kosher?
I'll answer your leading questions with scripture while I digest my BLTs
What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?
1 Corinthians 6:19
I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. Romans 12:1
In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: Colossians 2:11
Circumcise therefore the foreskin of your heart, and be no more stiffnecked .Deuteronomy 10:16
Thought I'd throw in some Old Testament law for ya.
But he is a Jew, which is one inwardly ; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God. Romans 2:29
That answer your questions as to what I know and believe?
Paul said (If I haven't posted this before) and I can say it also...."Neither can they prove the things whereof they now accuse me. But this I confess unto thee, that after the way which they call heresy, so worship I the God of my fathers, believing all things which are written in the law and in the prophets:
You'll find that in Acts chapter 24