The Joy Of Gurdjieff
No one of you separately is capable of doing anything real at all; therefore, even for the sake of only an egoistic aim, help one another in this newly formed group which might also be called a brotherhood. The more sincere you are with one another, the more useful you will be to one another.
Of course, be sincere only here in the group, and in questions concerning the common aim.
Sincerity with everyone in general is weakness, slavery and even a sign of hysteria.
Although normal man must be able to be sincere, yet he must also know when, where and for what purpose it is necessary to be sincere.
(All and everything, from Fifth Talk, Third Series)