By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name...
Romans 1:5
"Those who
---think that it matters not what they believe in doctrine,
---so long as they believe in Jesus Christ,
are on dangerous ground.
There are some who think that they will be just as acceptable to God 
by obeying some other law than the law of God—by meeting some other conditions than those He has specified in the gospel—... But they are under a fatal delusion, and unless they renounce this heresy and come into harmony with His requirements, they cannot become members of the royal family..."
E.G.W.