Master Po lies in this episode to Young Caine, in telling him that the pool of water is acid.
Caine does put on his shoes to attend the wedding.
Master Po: What is cowardice but the body's wisdom of its weakness? What is bravery but the body's wisdom of its strength. The coward and the hero march together within every man. So to call one man "coward" and another "brave" merely serves to indicate the possibilities of their achieving the opposite.
Master Kan: Those who speak convincingly of peace cannot go armed. Those who speak convincingly of peace must not be weak. So we make every finger a dagger. Every arm a spear. And every open hand an ax or a sword.
Caine: When you cease to strive to understand, then you will know without understanding.