For Thine is the kingdom and the power and the glory forever and ever.* Amen.
What does this mean? This means that I should be certain that these petitions are pleasing to our Father in heaven, and are heard by Him; for He Himself has commanded us to pray in this way and has promised to hear us. Amen, amen means yes, yes, it shall be so.
*These words were not in Luther’s Small Catechism.