What does faith comes from?

Faith is imparted by God.
8For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:Ephesians 2

How does God impart faith?

• Through the the bible we get to know the nature and promise of God.

20He staggered not at the promise of God through unbelief; but was strong in faith, giving glory to God;
21And being fully persuaded that, what he had promised, he was able also to perform.Romans 4

• Through enabling of the God himself.

11For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.1 Corinthians 2
14But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.1 Corinthians 2

The responsible of men
We must be humble and willing to obey and listen before God can impart faith in us.