The title of the sermon is a reminder that no matter what else Edwards is saying, each member of the congregation must picture him/herself as a...
I think that the challenge in filling in any potential blank is the idea of needing to find a "right answer." As a forum, enotes is one such domain where individuals share ideas and derive different answers, which might not fit the method of "filling in the blank." Having said this, you could run with a variety of answers which could evoke different concepts behind the original intent of the statement. For example, "each member of the congregation must picture himself/ herself as a victim to God's wrath." This could accomplish the idea that God is angry and individual actions are the reason why few will be spared his vengeance. If one wanted to approach it from a metaphorical point of view, "each member of the congregation must picture himself/ herself as a target where God's arrow is aimed." This plays with the idea that Edwards himself uses in describing the bend of God's bow in reference to the anti- spiritual ways of Colonists in the time period.
First, you need to realize that your teacher probably has some specific word in mind based on what you guys have been told in class or based on something your book says.
If I had to finish this, I would use the rather obvious word "sinner." Since this is clearly the only word in the title that makes any sense in this sentence, it is probably the right answer.
In the sermon, Edwards is trying to emphasize to his listeners that they all deserve God's hatred and wrath because they are all evil. Since that is his main theme, it is likely that the word "sinners" should be the end to the sentence you gave.