Revival brings back a holy shock to apathy and carelessness.
God can use the jawbone of an ass!
Every Christian a missionary; every non-Christian a mission-field.
No matter how high the powers of reason, no matter how deep the intellect, no one can discover God's secret messages without paying the cost of true discipleship.
God has guarded His Word so that only the pure in heart can see its secrets. All other efforts will fail.
Those that God used in the past were just ordinary people with an extraordinary Master. They were not all champions of great faith, but little people who saw their own need, and put their small faith in a great God.