 Eckhart was a significant influence in developing United Nations Secretary General Dag Hammarskjöld's conception of spiritual growth through selfless service to humanity, as detailed in his book of contemplations called Vägmärken ('Markings').In "Aion, Researches Into the Phenomenology of Self"  Carl G. Jung cites Eckhart approvingly in his discussion of Christ as a symbol of the archetypal self.Jung sees Eckhart as a Christian Gnostic