how the divine and the human are so closely united as to become one. He demonstrates inclinations towards Christian universalism in writing that "Man, having proceeded from God is destined to return, and become one with Him again." But here he is careful to clarify his position: "There where I assert that we are one in God, I must be understood in this sense that we are one in love, not in essence and nature." Despite this declaration, however, and other similar saving clauses scattered over his pages, some of Ruysbroeck's expressions are certainly rather unusual and startling. The sublimity of his subject-matter was such that it could scarcely be otherwise. His devoted friend, Geert Groote, a trained theologian, confessed to a feeling of uneasiness over certain of his phrases and passages, and begged him to change or modify them for the sake at least of the weak. Later on, Jean Gerson and then Bossuet both professed to find traces of unconscious pantheism in his works. As an offset, the enthusiastic commendations of his contemporaries should be mentioned. These were by mystics and scholars such as Groote, Johannes Tauler, Thomas à Kempis, John of Schoonhoven, and in subsequent times of the Franciscan Henry van Herp, the Carthusians Denis and Laurentius Surius, the Carmelite Thomas á Jesu, the Benedictine Louis de Blois, and the Jesuit Leonardus Lessius. Ernest Hello and especially Maurice Maeterlinck have done much to make his writings known. Ruysbroeck was a powerful influence in developing United Nations Secretary General Dag Hammarskjöld's conception of spiritual growth through selfless service to humanity, as expressed in his book of contemplations called Vägmärken ('Markings'). Ruysbroeck insisted that the soul finds God in its own depths, and noted three stages of progress in what he called the spiritual ladder of Christian attainment: (1) the active life, (2) the inward life, (3) the contemplative life. He did not teach the fusion of the self in God, but held that at the summit of the ascent the soul still preserves its identity. In the Kingdom of the Lovers of God he explains that those seeking wisdom must "flow forth on the waters to all the boundaries of the earth, that is, on compassion, pity and mercy shown to the needs of all men", must "fly in the air of the Rational faculty" and "refer all actions and virtues to the honour of God"; thence (through