Change
Groups, by being groups, resist change
Change is easiest for the self. It slows down the more people we involve when it will need to deal with the friction of language, culture, and status quo.
Groups, by being groups, resist change. When we change (our minds or views), we rarely need to find the words to differentiate the meaning we now see.
If we want to share (enroll) others in this meaning, we must find language (or experiences) to show this delta.