Menna, this image is taken from Mouravieff's Gnosis series, and represents the multitude of influences we each encounter and the path of spiritual growth. The diagram and explanations are relevant to your question.
The
large circle is the world and the multitude of influences and people that inhabit it.
A influences are represented by the
small black arrows, and are the general, common forces and influences we encounter under the law of accident in our everyday life. They head in every direction and lead one nowhere if one attempts to follow them.
The
Esoteric Center, represented by the
white circle, is a center of knowledge and being that leads to liberation from the law of accident, if one knows how to find it.
B influences are represented by the
white arrows, which emanate specifically from the Esoteric Center as a sort of magnetic field.
The common and unenlightened
external person is represented by a
cross-hatched circle, which stands for the many small I's a person has and the rudderless trajectory of life they wander.
Learning to distinguish A from B influences leads to the formation of the
magnetic center inside the person, represented by the
small whiteness growing inside the person. This grants one a semblance of direction in searching for the Esoteric Center.
The
lines between people of various sizes of magnetic center represent
C influences, which are influences that come more or less directly from others who are also on the path to liberation, and have a much better signal-to-noise ratio for searching for the Esoteric Center than the background static that engulfs us every day.
These
C influences form a continuous, unbroken chain between a person with a magnetic center who has found a teacher, school, or network, and the Esoteric Center that perfects his development as a person. It is unbroken because, to personally advance in the universe even one rung on the ladder, one must find someone who will replace your previous position lower down on the ladder (otherwise one may advance and leave earth, and those left behind will no longer have a link to the Esoteric Circle). By this same token, one cannot bring an unlimited number of people into the teachings (by means of C influences) without the knowledge and being required for one's further advancement (those who attempt so often speak of things they know little about as a form of self-deception, leading to the corruption of teachings that often characterize mass religious movements).
Now for my own personal take:
Is it possible to reach the Esoteric Center without C influences? I won't go as far as anart because technically it's not impossible; but you must be one of extraordinary insight, sincerity, virtue, will, et cetera. We encounter many B influences in our lives, but it's not an infinite number. If you connected and dialogued with someone on the other side of the planet, and both of you have functional magnetic centers, you both benefit from the B influences each has accumulated in their life. This isn't a matter of addition, but of multiplication; this is because we are not accumulating paper dollars, but triangulating the position of its printing press, so to speak. To reiterate: C influences have a MUCH HIGHER signal-to-noise ratio. From this cost-effectiveness standpoint, you'd be crazy to head out and search for genuine esoteric knowledge on b influences alone.