Law's relation to Boehme is apt to be misunderstood. It is sometimes supposed that it was Boehme's influence which was responsible for the entire mystical development which was the main feature of his later life. It is true that it was after he had begun to read Boehme's writings (about the year 1735, when he was 49) that the mystical aspect of his work came into evidence. His book on the "Sacrament of the Lord's Supper", written in 1737 in reply to Bishop Hoadley, is often regarded as the first of his mystical writings. Law himself, however, makes it abundantly clear that he was influenced by many other mystics -- especially by the so-called "Rhineland mystics" of the fourteenth century (apart from Eckhart, the greatest of them, of whom he had no knowledge). He was familiar with the work of most noteworthy Christian mystics from the pseudo-Dionysius in the fifth century to Mme. Guyon in the seventeenth. In his literary career there is a blank of nine years between "An Appeal to all that doubt the Truths of the Gospel" (1740) and the First Part of "The Spirit of Prayer" (1749). It seems to have been during this period that Law undertook the systematic study of Boehme.
Law was not at any time a mere mouthpiece of Boehme. His most fundamental conception is that of the universal divine presence in the human soul, and that is common ground among Christian mystics. It was this thought that led him to the universalism of his developed outlook. Seeing the divine Life in all, he rejoiced to see the manifestation of that Life, not only among Christians, but in non-Christian seers and saints. Here, Law was far in advance of the orthodox standpoint of his time. Although he was utterly opposed to the Rationalism of the Deists, he shared the breadth of their outlook in recognizing the universality of religion as rooted in the human soul. He was a Pioneer of the larger vision which is emerging in our time. It is true that he prided himself on his rigid adherence to the orthodox standards of the Church; he had as little sympathy with the Socinians and the Arians as he had with the Deists. For him, religion was far greater than any creed; it was the Life of the Spirit born within us.
Law went far in his opposition to the attitude which enthrones reason as man's highest faculty. Like Boehme, he emphasized the primacy of will. Yet his mysticism is in some aspects highly speculative. He claims that his conception of the origin of the material universe as a fall from the primary perfection and glory of "Eternal Nature" represents the true meaning of Scripture, but it is in fact based on the philosophy of Boehme, which has in this aspect strong Gnostic affinities. In his conception of "Eternal Nature", he gives expression to an aspect of the mystical tradition which has in recent years been widely neglected, although it has been emphasized in the writings of adherents of the Eastern Orthodox Church, like Soloviev, Berdyaev and S. L. Frank. It played a great part in the experience and teaching of William Blake (see "William Blakeand Neoplatonism", by G. M. Harper), and its significance was reaffirmed in some of her books by Evelyn Underhill. Among other "moderns", Max Plowman and Edward Carpenter have testified to its reality.
Law was at once orthodox and liberal in his outlook. His appeal was constantly to the Bible, and he naturally had no understanding of the historical origin and background of the Hebrew and Christian Scriptures. His thought is marked by certain outstanding contrasts. "Christ" is for him both a historical person and a universal principle, the eternal Word, the source of all that is good in our Life made manifest, above all, in the true spirit of love wherever it is found. For Law, therefore, the Incarnation is not merely a particular divine event, as it is for the great majority of Christian theologians -- it is also a universal process. He speaks explicitly of "incarnation" in that sense. It is not surprising that he failed to unify his thought on this question, so that his teaching is lacking in complete consistency. His emphasis varies, in fact, from time to time. Sometimes he thinks of salvation in accordance with traditional orthodoxy as wholly dependent on the Cross of Calvary; but more typically he regards it as springing from the divine Life in man, and so as an experience common to all who share the "spirit of prayer" to which that Life moves us. Again, while Law regarded the whole universe as an outgrowth of "Eternal Nature", and not as a creation ex nihilo, his view is marked, in one aspect, by a thoroughgoing dualism. Physical Nature is for him a fallen world, and in all its phases, from the constitution of matter to the life of the animals and the unregenerate human self, it represents, not the manifestation, but rather the absence of the divine. To say that is not to deny that his view of the world contains an important element of truth. The principle of mechanism exhibited in Nature underlies the regressive tendency which is the great obstacle to human progress; and it is from the exclusiveness of matter that the separateness which is the ground of conflict and evil appears to spring.
Law's view of the world as rooted in a primal Fall was naturally a somber one. During the greater part of his life it was not merely somber, but radically pessimistic, since he shared the belief in everlasting Hell almost universally held by Christians in his day. That belief is implied in some passages in both these books; but in "The Spirit of Love", it is finally replaced by the idea of Universal Restoration implied in other passages. Here, Law's insight altogether surpassed that of Boehme. It is indeed a tribute to the humane and enlightened quality of his thinking that he was a pioneer of the "larger hope". His enlightenment found expression also in his thoroughgoing repudiation of the penal theory of the Atonement and his adoption of a "moral" view. He transcended the limitations of Boehme's outlook in his complete rejection of the traditional idea of the wrath of God, although he felt justified in using the term in a sense of his own.
Law's mysticism is essentially related to his understanding of religion as an inward principle, grounded in the deeper nature of the soul. The inmost center of our being is for him the "spark of the soul", which is divine and which moves us therefore to seek after union with God. Law cannot be counted among the greatest of the mystics, for there is no indication in his writings that he attained the height of their experience. His mysticism is essentially dynamic and creative. It cannot be summed up in terms of vision or knowledge; it is a matter of life -- of willing rather than of knowing. The basic fact of mystical experience as he saw it is the abiding fact of divine inspiration -- the Life of God working within us, the flame of divine love, "the desire of the soul for God", which is the secret of union with God. It is the greatness of Law's written work -- and especially of the two books here mentioned -- that at its best it bears authentic testimony to that truth.
"No one can know or believe the Mysteries of Christ's redeeming Power by historically knowing, or rationally consenting to, That which is said of him and them in Written or Spoken Words. It can be achieved Only and Solely by an inward experimental finding and feeling the Operation of them, in that new Death and new Life, both of which must be effected in the Soul of Man - or Christ is not, cannot, be found and Known by the Soul as its Salvation. It must also be equally true, that the redeemed State of the Soul, being in itself Nothing else but Resurrection of a Divine and holy Life in it, must necessarily- from first to last - be the Sole Work of the Breathing, creating Spirit of God, as the first holy created state of the Soul was."
"For all man's blindness and misery lies in this: that he has lost the knowledge of God as essentially living within him, and by falling under the power of an earthly, bestial life, thinks only of God, as living in some other world - and so seeks only by notions, to set up an image of an absent God - instead of worshiping the God of life and power in whom he lives, moves and has his being"
William Law's life was divided into two VERY DISTINCT phases. During the first, he is noted especially for his manuscript, "A Serious Call to a Devout and Holy Life". This is a VERY legalistic, religious treatise regarding the necessity of and way to a holy life in Christ. He expounds upon WHAT a Christian is expected to do, but offers NO help as to HOW he is to achieve it.
The second phase seems to have occurred AFTER his filling with the Holy Spirit and his NEW birth in Christ.. His most notable work during THIS phase was "The Spirit of Love and the Spirit of Prayer".
Murray wrote that "he didn't know where to find anywhere else the same clear and powerful statement of the truth which the Church needs at the present day." Murray also said: "I have tried to read or consult every book I knew of that treats of the work of the Holy Spirit, and nowhere have I met with anything that brings the truth of our dependence upon the continual leading of the Spirit, and the assurance that that leading can be enjoyed without interruption, so home to the heart as the teaching of the present volume."