according to the foreknowledge of God the Father, in sanctification of the Spirit, that you may obey Jesus Christ and be sprinkled in his blood: Grace to you and peace be multiplied.
The word "foreknowledge" will be spoken of as being "foreordained" when we get to verse 20. Peter here is dealing with the doctrine of "divine election." Peter refers to the saints to whom he is writing as the "elect." So one fact is clear: the Bible teaches that there is such a thing as "divine election." What we do not have here, however, is how one is elected. We can only determine the "how" by looking to other scriptures.