1. M. Buber, Ten Rungs: Hasidic Sayings (New York: Schocken, 1970), 43. M. S. Kleinman, ed., Or yesharim(Piotrkow: 1924), 9.
2. T. D. Borkovec, E. Robinson, T. Pruzinsky, andj. A. DePree, “Preliminary Exploration of Worry: Some Characteristics and Processes,” Behavior Research and Therapy 21 (1983): 10.
1. Jedayah Bedersi (Ha-penini), Beh i not olam, trans. Tobias Goodman (London: 1806), chapter 13. See also chapters 15, 18, and 19 on worry, fear, and anxiety.
2. B. Spinoza, The Ethics, ed. S. Feldman, trans. S. Shirley (Indianapolis: Hackett Publishing Company, 1992), part 3, prop. 18, p. 115 and def. 13, p. 143.
3. G. C. L. Davey, and E. Tallis, Worrying: Perspectives on Theory, Assessment, and Treatment (Chichester: John Wiley and Sons, 1994), xi, 40. The term “work of worry” was coined by Irving Janis in the 1950s and refers to the worrying that enables us to cope more effectively in the long run with a situation of painful reality.
4. B. Sanhédrin 106b.
5. The Tanakh uses the words paḥad, ḥaradah, eymah, hat, aratz, yagor, be’atah, balahah, de’agah, tzar, dehilah and behalah to refer to various feelings of anxiety, worry, and fear. Thus, for example, it uses paḥad to refer to fear of an enemy (Ps. 64:2), fear of night (Ps. 91:5), fear of evil (Prov.