To the Editor: We noted that at the end of the excellent article on successful aging by George E. Vaillant, M.D., and Kenneth J. Mukamal, M.D. (1), there is a minor error that our shared respect for the "Bard of Avon" will not let us pass unnoticed. The authors refer to Hamlet’s great friend Horatio in paraphrasing a line that should be attributed to Cassius in addressing Brutus in Julius Caesar:
Men at some time are masters of their fates:
The fault, dear Brutus, is not in our stars,
But in ourselves, that we are underlings.
Julius Caesar, Act I, scene ii