On the wall of Miss Clara's house they look at a frame with a list of answered prayers. These answered prayers were real. This frame is now hanging on the wall in the Kendrick Brothers office.
In the park scene, Danielle is seen feeding a squirrel. This squirrel was actually an answer to prayer, the script called for one, but there were none on the site. So they prayed for one and when they were ready, it came. In the audio commentary, Alex Kendrick say's "We Prayed 'GOD we need one squirrel'. And when we had all the cameras ready, here comes one squirrel, comes right down the tree, we film those few seconds, we got it, and then the squirrel took off, never saw it again".
The man who's seen praying in the sunset at the very end had been praying for the city of Charlotte for 20 years. So they decided to use him for the scene.
The first scene filmed was where Miss Clara is cheering in her kitchen about the Devil getting his butt kicked. From this point on, they knew that Karen Abercrombie was great for the role. She was only in her 50s, but wore a wig and makeup to look older. In one scene where Elizabeth is touring her house, they look at a picture on the wall that shows Clara and her husband Leo from many years ago. This picture was actually taken earlier that same day when she wasn't wearing the wig.
The building used as Claras house was one that they came across just two weeks before starting. It was owned by a Pastor who let them rent it for a month. He had been trying to sell it for 9 months, but hadn't had much luck. He was very gracious to them, so they prayed that GOD would sell it for him. Amazingly, the day they finished shooting, a couple showed up, fell in love with the house, made an offer and it sold.