Probably the most powerful knot in the book. This design is a triquetra in its simplest form it represents (Mother Earth or the Triple Goddess) showing affinity towards the world as it should be (A Simply Thought) and doubly so, this double triquetra by two interwoven parallel lines. These two parallel lines are used to protect one another, from without and within, representing one individual's life and his or her relationship to another loved one, interwoven yet separate. Each triquetra also represents the forces of nature: earth, air and water. Later the triquetra was interpreted as the Holy Trinity and yet a strength in spiritual bond. The interwoven lines promote strength of friendship and love. I first came upon it on the Donaghmore cross in the Innisowen Peninsula, Co.Donegal.