It is a testimony of God's presence being the greatest of all circumstances and that which overcomes all other circumstances. And at midnight. In the darkness of a terrible prison cell at Philippi, Paul and Silas prayed and sang praises to God so as to be heard by the other prisoners. That is a great testimony of Paul and Silas. Let it also be a great example for us to follow.
Life is often very difficult and painful.
But no matter what we face, let others hear us pray and sing praises to our God.