It is by Faith in Jesus Christ which we are saved

For in the gospel the righteousness of God is revealed- a righteousness that is by faith from first to last, just as it is written: “The righteous will live by faith.” (Romans 1;14-17)

Faith Comes from hearing

So then faith comes by hearing, and hearing by the word of God. To hear, you must read the Word of God- the Bible, which grows faith.
(Romans 10:17)

Romans 10:17

Faith

For in it the righteousness of God is revealed from faith to faith; as it is written, “The just shall live by faith.”
(Romans 1:17)

Romans 1:17

Faith

patience and faith in all your persecutions 
(2 Thessalonians 1:4)

Read 2 ThdssaIonians  1:4

Faith - without works

What does it profit, my brethren, if someone says he has faith but does not have works?
(James 2:14)

James 2:14

Faith can be dead

What does it profit, my brethren, if someone says he has faith but does not have works?
(James 2:20)

James 2::20

Shallow belief

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

James 2:19

Deep Belief leads to Faith (with works) to Righteousness.

But do you want to know, O foolish man, that faith without works is dead?  (James 2:20-22)

James 2:20-22