Claim. Tong-ban breakthrough activity must be performed on foot — wearing through shoes and sweating — because the physical investment is itself the indemnity condition, not a delivery method.
Elaboration. SMM emphasizes the embodied form: “While carrying out this activity, you should expect to go through several pairs of shoes. For you to reach the leaders of tong and ban, driving a car won’t do. You have to walk. Even if you go through a few pairs of shoes, work on foot. See what happens if you sweat and try knocking on doors three or four times a day” (CSG 13.3 §2, 167-40, 1987.6.14). The same idiom appears in chapter 1’s homeland framing: “Unificationists must go out in their bare feet, if necessary, to create the homeland. Your leftover resources are not enough to save this nation … In the Unification Church, we determine to pioneer with our bare hands and feet” (CSG 13.1 §2, 14-201, 1964.10.7). The blood-sweat-and-tears formula is the practical signature of indemnity in Book13: “Unless you enter the house and invest your blood, sweat, and tears, restoration will not take place” (CSG 13.3 §4, 208-160, 1990.11.17). The physical mode is therefore load-bearing, not incidental.
See also. indemnity, believers-responsibility