Faith: the assurance of the unseen (Heb 11:1). God says to Abram, "Give up the entire security that has anchored your life, security that you can see, touch and feel, security that all around you honour. And trust all to me, whom you've never before known, whom your ancestors have never known, whom you cannot see or touch, whom you may not feel, and go where none of your kindred have ever gone."