He published nothing.
He founded no school, ordained no successors, granted no interviews, wrote no books. He left behind no manuscripts, no recordings, no body of correspondence. The exact dates of his birth and death are unknown. The country he came from is uncertain. The number of students he taught is unknown.
And yet, twice in the twentieth century, men who walked into his small Manhattan study walked back out as the eventual authors of books that, between them, would sell more than twenty million copies and shape the lives of millions of readers across nine decades.
This page is about Abdullah — what we know about him, what he taught, and why he matters for anyone trying to seriously understand the modern manifestation tradition.
The Historical Identification
The most rigorous historical work on Abdullah's identity — conducted by researchers including the New Thought scholar Mitch Horowitz — has converged on a single likely candidate: a man named Modeste Abdallah Guillaume, also recorded in some documents as G. Mahmud Ahmad Abdoullah.
By that account, Abdullah had been, earlier in his life, a baritone singer with the Williams and Walker Glee Club — an offshoot of the most successful Black vaudeville act in turn-of-the-century America. He performed with the company in the years 1905 to 1910. When the vaudeville career ended, his religious career began.
By 1928 he had established a study center at 30 West 72nd Street in Manhattan, on the Upper West Side, half a block from Central Park. He represented Islam, in those years, on interfaith panels alongside Paramahansa Yogananda (the future author of Autobiography of a Yogi) and Rabbi Stephen S. Wise. He was identified in the press as the leader of a small congregation he called the "Religion of Love."
He taught, among other things, Kabbalah. He taught Hebrew. He taught a method of esoteric Bible interpretation in which scripture was read not as history but as a coded set of instructions for the use of the imagination. He taught, by all accounts, in a manner that brooked no sentimentality and accepted no excuses.
The Two Famous Students
Two of his students, studying with him in the late 1920s and early 1930s, would go on to become two of the most-read self-help authors of the twentieth century.
Neville Goddard began studying with Abdullah in 1929, at the age of 24, and continued for the next seven years. Neville took the teaching and made it philosophically extreme — ultimately arguing that the imagination of the practitioner is God, that the Bible is a manual of the imagination's operations, and that the entire visible world is the externalization of one's inner states. He wrote fourteen books and gave thousands of lectures across forty years.
Joseph Murphy, the Irish-born pharmacist who would later be ordained a Religious Science minister by Ernest Holmes himself, was studying with Abdullah in roughly the same period. Murphy took the same teaching and made it scientifically accessible — framing it in the language of conscious-and-subconscious mind, of mental engineering, of techniques that any reader of a 1963 paperback could try at home. The Power of Your Subconscious Mind (1963) sold over fifteen million copies and remains in print.
Two students. Two completely different idioms. One teacher.
What He Taught
Reconstructed from the testimony of his students, Abdullah's central teaching was the most uncompromising version of the Law of Assumption ever recorded.
His method had no preliminary practices. There was no breathing technique to master, no diet to adopt, no period of preparation. There was only the instruction:
Assume, now, that the thing you want is already yours. Refuse to be moved.
To the student who said, "But it isn't yet true," Abdullah's answer — the answer he gave to Neville about Barbados in 1933, and the answer he is said to have given many other students — was: there is nothing to discuss. The assumption is the cause. The fact is the effect. To wait for the fact before making the assumption is to misunderstand the entire mechanism.
A few specific features of his teaching, drawn from what Neville and Murphy later passed on:
Bodily commitment. It was not enough to think the assumption. The student was required to move, eat, dress, speak, and sleep as the person to whom the assumed fact was already true. If Neville was in Barbados, he was to sleep as a man in a Barbadian bed. The body was an instrument of impression, not a passive observer.
Refusal of the sensory contradiction. The student would inevitably encounter, every waking hour, evidence that the assumed fact was not yet true. Abdullah's rule was that this evidence had no claim on the assumption. It was background noise. The senses report only the past — the precipitate of prior assumptions, already cooling. The current assumption is concerned with the future.
Persistence without limit. Abdullah set no expected timeline. The assumption was to be maintained until the fact arrived. If it did not arrive in a week, the assumption was to be maintained for another week. If it did not arrive in a month, another month. The mistake was always letting go too soon.
No invocation, no ritual, no help. Abdullah taught no prayer to be said, no candle to be lit, no name to be invoked. The imagination of the practitioner was the entire mechanism. There was nothing to call on, because there was no agency external to the practitioner's own imagination that was doing the work.
The Houdini Investigation
In 1929, an investigator named Rose Mackenberg — who worked for Harry Houdini's anti-fraud unit — published a brief exposé of Abdullah, focused on the credentials of his small ministry. The exposé was minor and dealt almost exclusively with the certification of his religious organization, not with the substance of his teaching.
Neville and Murphy, both already studying with Abdullah at the time of the exposé, were apparently unmoved by it. They went on studying. Whatever they were getting from him was, in their judgment, not a function of the paperwork.
For the modern reader, this is worth knowing chiefly as a piece of historical color and a warning. The judgment of authority — of officialdom, of credentialing bodies, of public exposés — is a poor instrument for assessing whether a teaching works. Either the technique produces the result, or it does not. Abdullah's two most famous students walked past the exposé and went on producing results.
Why He Never Published
There is one detail about Abdullah that is, for the discerning reader, the most significant detail of all.
He did not publish.
He had every opportunity. He was in New York in the 1920s and 1930s, in the middle of the New Thought publishing boom. Wattles, Holmes, Hill, and Atkinson all had books out. The market for this kind of teaching was alive. Abdullah's friends and students included people who knew the publishing world. Murphy and Neville, when they began publishing in the 1930s and 40s, would have happily promoted him.
He published nothing.
The most plausible reading of this silence is that he understood something about the nature of the teaching that most teachers who followed him have not. A printed book reaches a thousand readers who will skim it, agree with it, and never apply it. A trained student, drilled in private over years, reaches the level at which the teaching can be lived. Abdullah, it seems, was not interested in being widely heard. He was interested in producing operators.
He produced at least two of them whose names we know. There may have been others whose names we do not.
Why This Matters Now
The lesson of Abdullah, for the modern reader, is not that one must find a personal teacher (almost no one will), or that one must be initiated into a secret tradition (there is no secret left to keep). The lesson is about temperament.
The widely accessible version of these techniques is what is in print. The version that actually works, week after week, is the version held with the kind of discipline Abdullah taught — and demanded.