The butterfly that landed on Mrs. O’Brien’s hand was not CG, but a real one. One morning while both Jessica Chastain and Brad Pitt were rehearsing, Terrence Malick spotted it flying around. He got the crew, and Chastain followed it for three blocks, then got her to step into the middle of a street and hold her hand up.
"There were two ways through life - the way of nature and the way of grace. You have to choose which one you’ll follow…Nature only wants to please itself. Get others to please it too. It finds reasons to be unhappy when all the world is shining around it. Grace doesn’t try to please itself. Accepts being slighted, forgotten, disliked…love is smiling through all things."