Wisdom on polemics and laughter from Tertullian:
But although I must postpone all discussion, and be content at present with the mere exposition (of the heresy), still, wherever any scandalous feature shall seem to require a castigation, it must be attacked by all means, if only with a passing thrust. Let the reader regard it as the skirmish before the battle. It will be my drift to show how to wound rather than to inflict deep gashes. If in any instance mirth be excited, this will be quite as much as the subject deserves. There are many things which deserve refutation in such a way as to have no gravity expended on them. Vain and silly topics are met with especial fitness by laughter. Even the truth may indulge in ridicule, because it is jubilant; it may play with its enemies, because it is fearless. Only we must take care that its laughter be not unseemly, and so itself be laughed at; but wherever its mirth is decent, there it is a duty to indulge it.