Knowing who we are in God's eyes can give us a tremendous sense of inner peace and strength. This allows us to be faithful to the work God has sent us here to do, no matter how hard it gets.
We tend to think of a prophet as one who predicts the future, but that is not at all the ancient understanding of the word. The word "prophet" means speaker, or one who speaks. In Christian use, a prophet is one who has a special connection to God and speaks on God's behalf.
By virtue of our Baptism we are invested in the threefold office of Christ, priest, prophet, and king. The degree to which we fulfill each of these offices will depend on our individual gifts and calling. We are all called to be prophets, as well as priests and kings, to the degree our gifts allow us.