Things come in threes.

I've just started The Black House by Peter May sadly topical work of fiction about a murder on the Isle of Lewis. The text is prefaced by a quote from a Gaelic Poem and the translation is given as

Three things that come without asking: fear, love and jealousy.

Three things again though I thing the inclusion of ham and cheese and the absence of fear and jealousy has much to recommend Baltasar's view of the world.