In Hebrews 11 we see how God worked through the lives of Abel, Enoch, Noah, Abraham and others. Then we read about the parting of the Red Sea, the Jordan River crossing and the fall of the walls of Jericho. We read of the miracles of Elijah and Elisha and stand in awe and wonder at the power of God. Then when you move ahead in history you can read about missionary greats like Hudson Taylor, David Brainerd, Jim Elliot and others, all showing that God was at work in those eras.