The critical question about regret is whether experience led to growth and new learning. Some people seem to keep on making the same mistakes, while others at least make new ones. Regret and remorse can be either paralyzing or inspiring. [p. 199]
We do not need to understand other people and their customs fully to interact with them and learn in the process; it is making the effort to interact without knowing all the rules, improvising certain situations, which allows us to grow.