"Among us" means within our group or community, present in our midst. It says that someone or something is part of those here, sometimes even hidden.
Great writers arrive among us like new diseases threatening, powerful, impatient for patients to pick up their virus, irresistible. Craig Raine
The dead walk among us. Zombies, ghouls - no matter what their label - these somnambulists are the greatest threat to humanity, other than humanity itself. Max Brooks
Among us on the earth there is His memory; but in the Kingdom of heaven His very Presence. That Presence is the joy of those who have already attained to beatitude; the memory is the comfort of us who are still wayfarers, journeying towards the Fatherland. Bernard of Clairvaux
The wisest among us is very lucky never to have met the woman, be she beautiful or ugly, intelligent or stupid, who could drive him crazy enough to be fit to be put into an asylum. Denis Diderot
Who among us is not thinking about divorce, except for a few tiny-minded stick-in-the-muds who don't count? Donald Barthelme
The dead are among us. African Proverb