Zwingli: On the True Church

This [i.e., the true] church is known to God alone, for he alone knows the hearts of the children of men. But, nevertheless, those who are members of this church, since they have faith, know that they themselves are elect and are members of this first church, but are ignorant of the members other than themselves. — Huldrych Zwingli

The only people we know are elect are ourselves. We don’t know about the status of anyone else. We don’t know who’s in, or who’s out. Only God does.