'Reb Simcha Bunem of Pshischa [said] that a person should carry one slip of paper in each pocket. On one paper should be written, “I am but dust and ashes” (Genesis 18:27), and on the other should be written, “The world was created for me” (Talmud Sanhedrin 37b). When we’re feeling too full of ourselves, Reb Simcha taught, we should look at the first slip of paper. When we’re feeling too insecure, we should look at the second. '