Man's "work of faith" is to "believe". God's "work" is to do what man is having "faith" in him to do.
One must collect the word of God in the area you wish to overcome and study them, meditate on them, and then become fully persuaded...
Romans 4:21 (KJV)
And being fully persuaded that, what he had promised, he was able also to perform.
Speaking the word of God brings faith because when you speak it, it goes into your own ears and since it's coming from your own lips your brain rationalizes that it must be true and starts to tell the heart. This is building up your faith. Then your heart accepts it and you have delivery. All while eliminating the negative thoughts about what the word of God states. This is the process of working out our own salvation! One must be teachable by the Holy Spirit, the Author of the word of God.
Wow! Thank you Lord!! I need to keep this for myself!