Do Orthodox Christians believe in the Trinity? Absolutely! Oh Yes!
Updated: 5 days ago
At the baptism of Jesus all three of the Persons of the Holy Trinity appeared together for the first time. See-Matthew 3:16-17.
In short, "the doctrine of the Trinity, which is based on a person's experience of God in the New Testament, is anchored in Scripture.
No one can be a Christian without being baptized said Jesus. And no one can be baptized except in the name of Father, Son, and Holy Spirit, which is to say the no one can be a Christian unless he believes in the Trinity". Fr. Anthony Coniaris.