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.

By what is this cleansing from sin and fitting for God's service accomplished?
Does it matter what one believes, so long as he is sincere?
What was the fourth beast declared to be?
How many must meet the test of the judgment?
What other reason is given for keeping the Sabbath?
Do the Scriptures indicate that there will he violence manifested in this conflict?
To what place did Jesus retire for secret devotion?

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