Courtesy is a science of the highest importance. It is...opening a door that we may derive instruction from the example of others, and at the same time enabling us to benefit them by our example, if there be anything in our character worthy of imitation.
Michel de MontaigneA volunteer, you assign yourself specific roles and risks according to your judgement of their brilliance and importance, and you see when life itself may be justifiably devoted to them.
Michel de Montaigne