תמים תהיה עם ד' אלקיך
Rashi explains this to mean that one should follow Hashem with perfect faith, not being concerned about what will occur in the future (as was the custom in those days to seek out the counsel of diviners and astrologers). This means accepting whatever befalls a person with wholeheartedness and absolute conviction, recognizing it as the will of Hashem. Once, during the Middle Ages (as quoted by Horav Eli Munk, zl, in The Call of the Torah), a holy man gave a kemeiah, amulet, to someone who was anxious about the future. He warned him not to open it for an…