Since the early days of the church, people have tried to deny the Incarnation and still call themselves Christians. The little letter of 2 John is an answer to them and a reaffirmation of the truth about God in the flesh.
God's presence in the early church produced awesome acts of community giving and healing but also an awesome judgment against hypocrisy and deception.
There are two basic principles that enable Christians with differing convictions on debatable matters to live together in harmony in the church.
In Daniel 2, a problem arose because of the absence of the gods among humans, but the true God showed himself through a human.