They went out from among us, but they were not of us. For, if they had been of us, certainly they would have remained with us. But in this way, it is made manifest that none of them are of us
Other versions
King James Version
They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.English Standard Version
They went out from us, but they were not of us; for if they had been of us, they would have continued with us. But they went out, that it might become plain that they all are not of us.New International Version
They went out from us, but they did not really belong to us. For if they had belonged to us, they would have remained with us; but their going showed that none of them belonged to us.