Group work without a teacher, is fun at times, interesting at others, but just a hobby - the blind leading the blind.
Group work with a teacher, is fun at times, interesting at others, but also, just a hobby, until a person has a direct, personal relationship with someone from whom he can learn, someone who can teach him. At that point, he may have to leave, or he may have to stay - but, he can't know either way until he knows.
Some people require years to become such a person - one who can recognize, in reality, another he can learn from, and someone who can teach him what he needs to know. Some never get to that point, though they may remain "connected" to the "organization" for many years, ultimately achieving nothing.
When a person can, almost impartially hear what another is saying, and understand, almost objectively, what he is doing, he can learn from him. How long a person stays in physical proximity to such a person, is very variable - depending on the people involved. There probably can't be categorical statements about whether or not a person should find a group, join a group, cozy up to a teacher, and stay for a lifetime. There are cases when a person was ready to meet an extraordinary person, who could teach him by words and deeds, more in months, than most ever get in a lifetime. This is not a theory.
What a person needs, to increase his ordinary slow pace of living, and start learning from just breathing, and just being alive on Earth, amongst other people, is Information which is not in the common trough where other people are rooting around for such. That trough includes religions, philosophies, psychologies, systems of all kinds, science, and mysticism, etc. Call it A or B influences, it doesn't matter. That common information which is "freely" available in libraries and bookstores, is too common and too readily dismissed even by supposedly otherwise ready individuals to do them any real good. You might "believe" that people associated with "recognized" groups studying the "authorized" texts and led by "self-styled" teachers, are a cut above the normal folks who are not so associated, but that's incorrect. They're not. They are identical to everybody else.
Even the Fourth Way has become so controversial, amongst the 10's of 1000's of people calling themselves "followers/studiers/students", and joining groups, email lists, study groups, that the maps and tools are almost empty in nutritional content - as energy, it's just too slow, to be effective - like, it has bounced off too many heads by the time it gets to you. Most groups spend most of their time in trivialities - having descended into arguments, discussions, debates, about the organization, as well as the ideas (what they mean, where they came from, how to implement them) and so, no one achieves the instant, almost immediate Realization of the deeper meanings of the information. Some people actually believe, that it requires decades to understand things. That's untrue. It's takes as long as it takes based upon the potency of the Information, and the capacity of the receiver. Better information can sometimes be instantly realized as True and Correct (for all intents and purposes), while lesser information will many times never be verified at all. This is not a theory.
For example: self remembering, and self observation. These are interesting restatements of ideas which have been around for centuries, further clarified today, >>because they had to be<< to be continuingly effective. Realize this: "Count your breaths", or "Watch your hands", or "Say the name of God over and over", is just as good a method, as S-R, but they don't work the way they once may have. There is a reason for this, and it's the same as why, "Don't worry, Be happy" doesn't work. People are too astute today, their intellects too complex and sophisticated, to be pulled into such simplistic statements, once they've Realized there's truly a Mystery, and they've only just touched it.
That is, a person can know he is on the virge of touching the Real, but only when he realizes that there is available NO SUCH INFORMATION for what he wants and needs. Not, that he hasn't found it yet; not, that he needs to go to the East or Middle East or Near East, or Philadelphia, or some silly bookstore, to find it. It's not available, EXCEPT inside the head(s) of some person(s) alive today, he either hasn't met yet, or wants to. At that point, armed with the firm Realization, that the Information he needs to do what he wants and needs, does not exist "out-there" in bookstores nor libraries, but only inside the head(s) of some, probably very few, people, who probably aren't advertising it in any grandiose way, he can start to move from where he is - the past - toward the Future - which is Real.
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ps- believe it or don't believe it - you can't verify it either way - there are people alive today living in the state of consciousness proper for Men of the Future. How FAR in the future is unknown, but definitely in the future.
pps- as if you haven't already intuited it yet... The Real Potent Information of which I am referring, exists there - in the Future, not "here" and "now", in the virtual past.