Alexander III was Tsar of Russia from 1881-1894. His rule was marked by repression, and in particular by persecution of Jews. His wife, Maria Fedorovna, provided a stark contrast, being known for her generosity to those in need. On one occasion her husband had signed an order consigning a prisoner to life in exile. It read simply “Pardon impossible, to be sent to Siberia.” Maria changed that prisoners life by moving the comma in her husband’s order. She altered it to “Pardon, impossible to be sent to Siberia.”
In Christ God has changed the comma that stood against us. From “Pardon impossible, send to Siberia” comes the good news of salvation: “Pardon, impossible to send to Siberia.”
Sources: biography.com and Today in the Word, July 14, 1993.