People categorize other people: enemy or friend; family or stranger; insider or outsider.

人们很容易把其他人分类：敌人或是朋友、亲人或是陌生人、自己人或是外人。

youdao

There's no in between,there's no gray area, you're either in or you're out, so scholars define this by talking about Johannine sectarianism, the insider-outsider divisions.

没有中间区域，黑白分明，你要么在其中，要么在其外，学者在探讨约翰基督教时定义了这一点，局内和局外的区别。

youdao

First of all, did you consider yourself and insider or an outsider?

NPR: Book Examines Covering the Race Beat

Obama's selection of a reliable insider and budget expert for the critical Treasury job and not a prominent outsider with broad business or Wall Street experience is yet another sign that he intends to actively pursue his economic-policy objectives in his second term, including raising more tax revenues from the wealthy than agreed to in the fiscal-cliff deal.

NPR: THE RESET: Obama Picks Familiar Faces For 2nd Term