54 He has helped  his servant Israel,
remembering to be merciful
55 to Abraham and his descendants forever,
just as he promised our ancestors.”

56 Mary stayed with Elizabeth for about three months and then returned home.

Luke 1:54-55 (NIV)
Do you want the kind of boldness that causes you  to obey God even in the face of death? That is the kind of boldness it takes to  do great things for God. Mary faced death with the assignment that God had  placed in her life, but she agreed. How did she build that boldness in her life?  The last lines of her song could be part of the answer. She knew history. She knew as a decedent of Abraham she had access to God’s promises.  She knew that God had promises to fulfill to His people, and we can know  God’s promises to us. We can have the boldness to obey God as  well.

 Mary knew and acknowledged what God had done in the past for her  ancestors. God always came to the aid of His people. She knew that Abraham and  his descendants had been helped many times in the past. As a descendant of  Abraham, Mary could trust that God was with her and would help her with the  difficult assignment that she faced.

 The  promise was not just for her, though. The Israelites, the heirs to the Abrahamic  covenant, had waiting a long time for a deliverer, the Messiah, a Savior. Mary’s assignment was to birth this Savior. Her assignment would result in success  because it was the promise God made to His people. 
Jesus came to show mercy to the entire human population. Jesus’  blood covers everyone sins, not just the sins of the Israelites. All those who  come in the name of Jesus and ask for forgiveness are shown mercy. Because of  Jesus we are all co-heirs with Jesus and can rely on God’s  promises.

 Knowing this part of history gives us a certain level of  boldness. Is that enough for every assignment God has asked of us? Mary  probably knew her history well. That knowledge could help face the difficulties  in her path.  The decedents of  Abraham who knew about God’s power had the boldness to complete their  assignments, and we need to diligently study God’s Word to build our faith.  Diligent study of God’s Word gives us the boldness we  need.