And you can substantiate these statements how? "Doctrine" is what we "merely" believe about God? "Doctrine" is the historically accepted body of teaching about the Faith.
Jhn 7:16 Jesus answered them, and said, My doctrine is not mine, but his that sent me.
Jhn 7:17 If any man will do his will, he shall know of the doctrine, whether it be of God, or [whether] I speak of myself.
Act 2:42 And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers.
Rom 16:17 Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
1Ti 4:6 If thou put the brethren in remembrance of these things, thou shalt be a good minister of Jesus Christ, nourished up in the words of faith and of good doctrine, whereunto thou hast attained.
2Ti 3:16 All scripture [is] given by inspiration of God, and [is] profitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 4:2 Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine.
I don't see anything is these verses which indicates "doctrine" is merely what we believe, and "doctrinal purity" is the other guy agreeing with us.
Please explain the following:
Your turn! :)