The fervency and persistence of the Koreans is an indication of the new place in prayer they have found. They pray through every visible and invisible hindrance before them. Lives are changed. Joy and peace and faith become contagious. Unbelievers are attracted to church and they accept Jesus Christ as Lord and Savior.
Prayer is the key.
In the Bible, examples of praying people are everywhere. These people knew how to pray. They prayed God down on their world, and He opened heaven to them. For example, Moses had power in prayer. He could speak with authority, not only to the enemies of God, but also to God's people.