Faith is tested and tried and indeed understood only in life. A paper, mental understanding is not enough.
We read in scripture that at a certain point in Enoch’s life he began to walk faithfully with God, and did so for 300 years before God took him. Life is about where the rubber meets the road, as we say. And faith is about life. If it is less than that, than it’s not really faith, the faith God in Jesus calls us to live in.
Head knowledge is not enough. It must work it’s way into our hearts and bones as well, into the warp and woof of our lives. If not we’ve missed the boat.
Faith is known only in life. A life together in Jesus in and for the world.