If only customs were logical. If only the rules were as simple as "Don't do anything that will hurt others." If that were the only rule, I’d have at least a fifty percent chance of getting it right. I would, for example, ask myself whether saying the Rosary silently on the train would hurt others. The answer would be no and so I would say it. As it is, the reasons as to why something is right and something is not seem arbitrary.
Francisco X. Stork, Marcelo in the Real World
culture, logic, rules