It Only Qualifies You To Be A Demon

John 12:42 Nevertheless even among the rulers many believed in Him, but because of the Pharisees they did not confess Him, lest they should be put out of the synagogue;
43 for they loved the praise of men more than the praise of God.

WOW! This is the epitome of pride. They believed Jesus was The Son of God and they still did not want to "confess" Him. Remember Romans 10:9?

Romans 10:9 that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved.

These men were so worried about their status in this world that they were willing to lose their eternal life.

James 2:19 You believe that there is one God. You do well. Even the demons believe—and tremble!

To only believe who Jesus is, only qualifies you to be a prideful pharisee or a demon. Belief without surrender is nothing. Look what Jesus said in John 12:26:

John 12:26 If anyone serves Me, let him follow Me; and where I am, there My servant will be also. If anyone serves Me, him My Father will honor.

If mere "belief" in who Jesus was saved us, why would John 12 make it so clear that we are to serve Him, and reference those that believed who He was, but loved the world more?

Our service to Jesus doesn't save us, but it is evidence that we are saved.