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.
Tertullian
Against the Valentinians
Chapter VI