What does it mean that the Bible is a progressive revelation?
It means God did not give the whole picture at once; all the seeds are in Genesis, but Scripture unfolds His dealings with the human race from Adam through the Gospels to Revelation and eternity. The Bible is God's record of history written in advance.
Les teaches that the Bible is a progressive revelation, meaning God did not see fit to give the whole picture back in Genesis. All the seeds of it are there, but the overall scheme unfolds as God deals with the human race beginning with Adam and moving all the way to Revelation and the introduction to eternity. He notes the Bible is God's record of history written in advance, and in studying the Gospels they pick up the main theme of how all these things unfolded, preparing everything for the end time.