The blessing of heaven, cloud blessing,
The blessing of earth, fruit blessing,
The blessing of sea, fish blessing.¹

Groups of three crop up a lot in spiritual, religious and philosophical traditions. For example the Christian Trinity, the Three Pure Ones of Taoism, and the Hindu Trimurti (illustrated below). In the Kabbalah, the tree of life has three pillars, sometimes called form, force and consciousness, and in the philosophy of G I Gurdjieff,  the Law of Three is a fundamental characteristic of existence:  every whole phenomenon is composed of three separate sources, which can be considered as affirming, denying and reconciling.

Groups of three are also found in druid tradition, for example embodied in the Welsh triads (three part verses from medieval times), the three cauldrons of the Old Irish Cauldron of Poesy, and the three legs of the awen symbol. One grouping that I want to consider is that of the three realms – the sky above, the earth below, and the waters around us.