Treat faith as a seed. Faith is a seed that needs to be sown by SAYING. God’s Word is faith seed. For every seed to produce, it needs life.
There’s life in every seed to produce after its kind. Harvest comes when you sow seeds, not by the size of barn, that have Jesus words spoken to us are Spirit and life.
The Word of God is incorruptible seed. It bears fruits eternally. The seed is the word of God that is planted in the soul or your mind.
The way you have faith in God is when you say what God said. Having faith in God is saying His Word. You don’t need faith in your spirit but your soul/mind needs the word of God.