Faith involves knowledge. For example, we are called to faith through some method of preaching or teaching. We are also sustained in our faith because of what we learn about God and ourselves. Both regeneration and renewal require spiritual knowledge. We might be emotionally moved to lay hold of what God offers us, but we would be hard pressed to move one inch toward God if we didn’t know the path to God and understand, at least, some of His benefits.
Because faith involves knowledge our faith is always mixed with some ambiguity. The Scripture confirms that we see or (understand) through a glass darkly until we all come into the unity of the faith. So for now, our faith is stained with imperfection because our knowledge of God is less than perfect. The only thing to do is keep learning about God to increase our faith.