D. A. Lague is the speaker for a ministry called Perspective From the Pages of Church History. His program lasts about 2 minutes and gives a quick overview and tells of the impact of dedicated Christians impact on others. The program is linked to a website called Historical Renewal. There are also transcripts available that are a great tool for teachers to use to give insight to their students on how to impact others in the name of Jesus Christ. You can also sign up for a subscription of daily devotions. Here is an example.