How far does one need to go to fast on Yom Kippur? R. Moshe Feinstein was asked not how to be exempted from fasting, but how can we make ourselves obligated? Moshe Kurtz takes us on a tour of several responsa with relevance for the upcoming holidays and demonstrates R. Feinstein’s broader approach to the role of artificial intervention in the halakhic process and a life motivated by joy of mitzvot.