We can excel in faith because Jesus pioneered it and perfected it, and since Christ is living in us, the life we are living is on the basis of that kind of faith. When I travel by plane I make an assumption that there is a pilot up the front of the plane. I rarely see one, but I assume that there is at least one in the cockpit. That is faith, because if there was any doubt about whether that plane has a pilot, I would not get on. I make the assumption, and I get on the plane.
Faith is an assumption, and faith makes an affirmation.
Faith is an assumption, makes an affirmation, and takes an action. I must get out of my house, get in the car, drive to the airport, show my ticket at the counter, and walk up the ramp on to the plane. There has to be action. It is the same faith, but being exercised on a different level. Let's excel in faith.