Designers love to group figures in three’s. This could be a reference to the Three Graces of Ancient Greece (Aglaia, Euphrosyne and Thalis - or brightness, joyfulness and bloom). Or the three fine arts: music, painting, literature. Or the three could be the Fates deciding the length of our life: Clotho (with her spindle), Lachesis (with her measuring device) and Atropos (with her shears). Christianity invokes Faith, Hope and Charity; we divide our sense of time into Past, Present and Future.