By what means were the apostles delivered from prison?

Answer

"The angel of the Lord by night opened the prison doors, and brought them forth." Acts 5: 19.

When proclaiming His name to Moses, how did the Lord define His character?
What reply did the Lord immediately make?
What rendered it possible for God to treat sinners thus?
What did Christ say of those who will to do God's will?
What was Paul's manner respecting the Sabbath?
What will then take place?
By what means were the apostles delivered from prison?

Questions & Answers are from the book Bible Readings for the Home Circle