 As it says in Ephesians 2, 8 and 9, it says that this is a gift from God. It's his grace that you can even have saving faith in the first place. The faith doesn't save you, but it enables you to respond to that gift of grace that God extends to you. And that is a work. It is a work of your intellect and your will. When you perceive that God is drawing you and you say, yes, you're having faith. Yes, I believe. God is not having faith for you.