Quoting Dr. Martin Luther, preaching on the text of John 20:11-18, delivered on April 21, 1530:
We are all saints, and cursed is he who does not want to call himself a saint. You are far saintlier than your names - Hans or Kunz - indicate. However, you do owe this not to yourself but to the will of God, who would be your Father. To call yourself a saint is, therefore, no presumption but an act of gratitude and a confession of God's blessings. He who does not consider Baptism and God's Word,
Ewald M. Plass, compiler, What Luther Says: A Practical In-Home Anthology for the Active Christian, (St. Louis: CPH, 1959) §3979, 1247.