God's laughter is sometimes very coarse and unfit for polite ears; He is not satisfied with being Moliere, He must needs also be Aristophanes and Rabelais.
From Thoughts and Aphorisms by Sri Aurobindo
Laughter is a weapon & not an old woman's advice. With use it becomes sharper. Against all attacks it has the capacity to turn aside, blunt, counter-attack, disperse, neutralise all attacks against you. It has a great field effect and converts many forces towards your side.
Against all attacks from any source-human or otherwise.
It grows with use.