lasted at least a month. sometimes i still feel shocked by this thing that happened in my life. >> cnn's paul has more on warren's return. >> reporter: carol, an emotional rick warren was greeted by overflow crowds and the pastor told his congregation, buckle up, we're shifting into hyperdrive, i'm back. >> in the past 16 weeks since mental illness took my son matthew's life -- >> reporter: an impassioned rick warren took his first sermon since his son matthew killed himself in april. with his wife, kate, at his side, warren told his saddleback church congregation matthew suffered from mental illness since childhood. >> we had gone to the best doctors money could buy. we had gotten the best medications. we had the best therapy. we had the best people praying. thousands of people praying. we have an incredibly strong family a with deep, deep faith.