“Enq: But what makes these people turn against the Society?
Theo: Wounded vanity in some form or other, almost in every case. Generally, because their dicta and advice are not taken as final and authoritative; or else, because they are of those who would rather reign in Hell than serve in Heaven. Because, in short, they cannot bear to stand second to anybody in anything.
So, for instance, one member – a true “Sir Oracle” – criticized, and almost defamed every member in the T.S. to outsiders as much as to Theosophists, under the pretext that they were all untheosophical, blaming them precisely for what he was himself doing all the time. Finally, he left the Society, giving as his reason a profound conviction that we were all (the Founders especially) – FRAUDS!
Another one, after intriguing in every possible way to be placed at the head of a large Section of the Society, finding that the members would not have him, turned against the Founders of the T.S., and became their bitterest enemy, denouncing one of them whenever he could, simply because the latter could not, and would not, force him upon the Members. This was simply a case of an outrageous wounded vanity.
Still another wanted to, and virtually did, practice black magic – i.e., undue personal psychological influence on certain Fellows, while pretending devotion and every Theosophical virtue.
When this was put to a stop to, the Member broke with Theosophy, and now slanders and lies against the same hapless leaders in the most virulent manner, endeavoring to break up the society by blackening the reputation of those whom that worthy “Fellow” was unable to deceive.
Enq: What would you do with such characters?
Theo: Leave them to their Karma. Because one person does evil that is no reason for others to do so.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 