I am sure it is not by accident that we have two Saints who fought to defend the divinity of Christ in the first week of Advent. St Nicholas's legend tells us he tore the beards of Arians at the Council of Nicea and Ambrose confronted an Arian Emperor and an Arian court.
Arianism says that the Son is less than the Father, he was not born before time began, that hence the Nicean Creed proclaims
... one Lord Jesus Christ,Pope Francis speaks of Pelagianism or neo-Pelagianism but Pelagianism is the fruit of Arianism. If Jesus is less than God then his example rather than his Divine power becomes more important, it is our response to him rather than his Grace that becomes stressed, our response to him becomes more important than he is. His teaching becomes a memory of the Church rather than the dynamic power that remains with the Church until the end of time. He becomes a historic event rather than present Presence.
the only begotten Son of God,
begotten of his Father before all worlds,
God of God, Light of Light,
very God of very God,
begotten, not made,
being of one substance with the Father;
by whom all things were made;
who for us men and for our salvation
came down from heaven ...
So have the Arians won? Is Christ now more a moral example rather than a living Presence.
If we believe sacraments are empty of Power that they are tokens of Christ, then we are probably Arians.
If we believe God is distant that our prayers are not heard, that there is a great gulf between us and God, then we are probably Arian.
If we believe that the Word of God is about giving a moral example which only a few can fulfil rather than something which is life changing with ease if we are open to Grace, then we are probably Arian.
If we see the liturgy it terms of giving us comfort, bringing us closer to the memory of Christ rather than the act in which we participate in the life of the Father through the Son in the unity of the Holy Spirit we are probably Arian.
If we see the Church not as a Mystical Communion but as something human we are probably Arian.
If we reduce the Mass to a meal or to community celebration, we are probably Arian.
If Confession is really just prayerful counselling, or therapy, we are probably Arian.
If we think prayer is just being still, we are probably Arian.
If we lack hope, we are probably Arian.
If we lack faith, we are probably Arian.
Above all if we lack charity, we are probably Arian.
Anything which tends to reduce Jesus, is Arian. Part of our fallen human nature is to dethrone God, to trample him in the dust, to crucify him. In the West, especially, we have a tendency to chip away at Christ's divinity, to reduce to our level rather than accepting he takes us to raise us up to his level. to being Sons. As he is by nature we are made by adoption, but because he is God-Man.