In the overhead shots of the woman rowing the boat, she makes concise and powerful strokes. In the close-ups of the actress rowing the boat, she can barely manage to get the oars in the water for more than a few inches.
The New Testament quote at the beginning of the movie, which also provides the movie's title, is cited as "Peter 5:8" but it should be "1 Peter 5:8". There are two letters of Peter, not simply one, and this quote is from the first letter.